| O | Oil | | | | Details |
| O | Osborne | | | | Details |
| o | oil | | | | Details |
| O | Oil | | | | Details |
| FOE | Fred Olsen Energy|| | Fred Olsen Energy | Fred Olsen Energie | Fred Olsen Energy | Details |
| NOS | North Sea|| | North Sea | Nordsee | La mer du nord | Details |
| CFO | Chief Financial Officer|| | Chief Financial Officer | Chief Financial Officer | Directeur financier | Details |
| CEO | Chief Executive Officer|| | Chief Executive Officer | Geschäftsführer | Directeur Général | Details |
| COO | Chief Operating Officer|| | Chief Operating Officer | Chief Operating Officer | Chief Operating Officer | Details |
| CAO | Chief Accounting Officer|| | Chief Accounting Officer | Chief Accounting Officer | Chief Accounting Officer | Details |
| CAO | Chief Administrative Officer|| | Chief Administrative Officer | Chief Administrative Officer | Directeur administratif | Details |
| CAO | Chief Analytics Officer|| | Chief Analytics Officer | Chief Analytics Officer | Chief Analytics Officer | Details |
| CTO | Chief Transformation Officer|| | Chief Transformation Officer | Chef Transformation Offizier | Chef de la Transformation | Details |
| KOH | Kalilauge|| | potassium hydroxide | Kaliumhydroxid | l'hydroxyde de potassium | Details |
| SOB | Sondenbehandlung und Bohren|| | Probed and drilling | Sondiert und Bohren | Palpé et de forage | Details |
| IO | Integrated Operations|| | Integrated Operations | Integrated Operations | opérations intégrées | Details |
| COM | Chance Of Maturation|| | Chance Of Maturation | Chance Reife | Chance Of Maturation | Details |
| COF | Cost of Failure|| | Cost of Failure | Kosten des Scheiterns | Coût de l'échec | Details |
| NOW | now|| | now | jetzt | maintenant | Details |
| recov | Recoverable|| | Recoverable | Behebbarer | récupérable | Details |
| Co | Compressibility of Oil|| | Compressibility of Oil | Kompressibilität von Öl | Compressibilité du pétrole | Details |
| TO | to|| | to | nach | à | Details |
| FCO | Foreign Company|| | Foreign Company | Ausländische Firma | Entreprise étrangère | Details |
| COD | coefficient of determination|| | coefficient of determination | Bestimmtheitsmaß | coefficient de détermination | Details |
| 2LoT | 2nd Law of Thermodynamics | | | | Details |
| AAIOR | annualized average incremental oil rate | | | | Details |
| AAMO | Apparent Anisotropic Move Out (WesternGeco) | | | | Details |
| AAODC | American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC) | | | | Details |
| AAODC | American Association of Oilwell Drilling Contractors | | | | Details |
| AAODC | See IADC | | | | Details |
| abd loc | abandoned location | | | | Details |
| abd-ogw | abandoned oil & gas well | | | | Details |
| abd-ow | abandoned oil well | | | | Details |
| ABO | Aker Borgestad Operations | | | | Details |
| ABOI | Assn. of British Oceanic Industries UK | | | | Details |
| ABSORB | Alaska Beaufort Seat Oil Spill Response Body | | | | Details |
| ACOU | Acoustic | | | | Details |
| ACRONYMS | AND ABBREVIATIONSAC–4 PRUDENT DEVELOPMENT: Realizing the Potential of North America’s Abundant Natural Gas and Oil Resources | | | | Details |
| ADCO | Abu Dhabi Company for Onshore Oil Operations | | | | Details |
| ADCO | Abu Dhabi Co. for Onshore Oil Operations Abu Dhabi | | | | Details |
| ADCOM | ADress COMission | | | | Details |
| ADESCO | Abu Dhabi Emergency Committee of Offshore Operators | | | | Details |
| ADMA-OPCO | Abu Dhabi Marine Operating Co. Abu Dhabi | | | | Details |
| ADNATCO | Abu Dhabi National Tanker Co. Abu Dhabi | | | | Details |
| ADNOC | Abu Dhabi National Oil Company Abu Dhabi | | | | Details |
| ADNOC-FOD | Abu Dhabi National Oil Company for Distribution Abu Dhabi | | | | Details |
| ADOM | adomite | | | | Details |
| ADPPOC | Abu Dhabi Petroleum Ports Operating Co. Abu Dhabi | | | | Details |
| ADROC | Advanced Rock Properties Report | | | | Details |
| AEO | Annual Energy Outlook, EIA | | | | Details |
| AF/COND | after condenser | | | | Details |
| AGO | ANGOLA | | | | Details |
| aGOC | Actual Gas Oil Contact | | | | Details |
| AGOC | Aramco Gulf Operations Co. Ltd. Saudi Arabia | | | | Details |
| Agoco | Arabian Gulf Oil Company | | | | Details |
| AGOCO | Arabian Gulf Oil Company Libya | | | | Details |
| AGORA | Adaptative Ground Roll Attenuation (from CGG) | | | | Details |
| AIDMO | Arab Industrial Development and Mining Organization | | | | Details |
| AIOC | Azerbaijan International Operating Company | | | | Details |
| AKO | Adjustable Kick Off | | | | Details |
| ALBPETROL | Albanian Petroleum Corporation Albania | | | | Details |
| ALCOA | Aluminum Company of America | | | | Details |
| ALEPCO | Ste. Algero-Arab-Libyenne d’Exploitation et de Production des Produits Petroliers Algeria | | | | Details |
| ALICO | American Life Insurance Company | | | | Details |
| ALLOW | allowable, allowance | | | | Details |
| ALOC | allocation | | | | Details |
| Aminoil | American Independent Oil Company | | | | Details |
| AMO | Azimuth Move Out | | | | Details |
| amor | amorphous | | | | Details |
| amort | amortization | | | | Details |
| AMPOL | Australian Petroleum Pty. Ltd. Australia | | | | Details |
| ANACO | Analysis of Core Logs Report | | | | Details |
| Anion | an ion with a negative charge | | | | Details |
| Anode | the positively charged site in a cell Oxidation site The site of metal loss in corrosion | | | | Details |
| anode | Corrosion prevention device | | | | Details |
| ANOVA | Analysis Of Variance | | | | Details |
| AO | ANGOLA | | | | Details |
| AOAC | Association of Official Agricultural Chemists | | | | Details |
| AOB | Any Other Business | | | | Details |
| AOC | Arabian Oil Company | | | | Details |
| AOC | Aramco Overseas Company | | | | Details |
| AOC | Arabian Oil Company Ltd. Japan | | | | Details |
| AOC | Aramco Overseas Company Netherlands, China, Korea | | | | Details |
| AOCS | American Oil Chemists Society | | | | Details |
| AOF | Absolute Open Flow | | | | Details |
| AOF | Absolute Open-hole Flow | | | | Details |
| AOF | see Absolute Open Flow The maximum rate that a well can produce at the lowest possible bottom hole pressure (usually figured with a gas gradient) | | | | Details |
| AOF | absolute open flow potential(gas well) | | | | Details |
| AOFP | Absolute Open Flow Potential | | | | Details |
| AOGA | Alaskan Oil & Gas Association | | | | Details |
| AOI | Area Of Interest | | | | Details |
| AoO | Area of Operation | | | | Details |
| AOP | Asset Open Plan | | | | Details |
| AOP | Asphaltene Onset Pressure | | | | Details |
| AOPL | Association of Oil Pipe Lines | | | | Details |
| AOR | authorized over-run | | | | Details |
| AORV | Annulus Operated Reversing Valve (Expro DST tool) | | | | Details |
| AOSC | Association of Oilwell Servicing Contractors | | | | Details |
| AOV | Air Operated Valve | | | | Details |
| Apicorp | Arab Petroleum Investment Corporation | | | | Details |
| APO | After Pay Out | | | | Details |
| approx | approximate | | | | Details |
| approx | approximately | | | | Details |
| approx | approximate(ly) | | | | Details |
| APSCO | Arab Petroleum Services Co. OAPEC | | | | Details |
| Aramco | Arabian American Oil Company | | | | Details |
| ARAMCO | (see Saudi Aramco) (formerly Arabian American Oil Company) Saudi Arabia | | | | Details |
| Archeo | Archeozoic | | | | Details |
| Arco | Atlantic Richfield Company | | | | Details |
| ARCO | Atlantic Richfield Co. | | | | Details |
| ARO | after receipt of order(purchasing term) | | | | Details |
| ARO-at | rate of | | | | Details |
| arom | aromatics | | | | Details |
| ASO | acid-soluble oil | | | | Details |
| ASPO | Association for the Study of Peak Oil | | | | Details |
| ASPO-USA | Association for the Study of Peak Oil-USA | | | | Details |
| assoc | associate(d)(s) | | | | Details |
| ATLANTICO | Compania Espanola de Petroleos Atlantico S.A. Spain | | | | Details |
| auto | automatic | | | | Details |
| auto | automotive | | | | Details |
| autogas | automotive gasoline | | | | Details |
| AVO | Amplitude Versus Offset (geophysics) | | | | Details |
| AVO | Amplitude Versus Offset | | | | Details |
| AWO | Approval for Well Operation | | | | Details |
| AWO | Approval Well Operation | | | | Details |
| aWOC | Actual Water Oil Contact | | | | Details |
| AXORC | Assuit Oil Refining Company Egypt | | | | Details |
| aztrop | Azeotrophic | | | | Details |
| b/off | buck-off | | | | Details |
| b/on | buck-on | | | | Details |
| Banoco | Bahrain National Oil Company | | | | Details |
| BANOCO | Bahrain National Oil Company Bahrain | | | | Details |
| Bapco | Bahrain Petroleum Company | | | | Details |
| BAPCO | Bahrain Petroleum Company BSC Bahrain | | | | Details |
| Bapetco | Badr al-Din Petroleum Company | | | | Details |
| BAPETCO | Badr El Deen Petroleum Co. Egypt | | | | Details |
| BaSO4 | barium sulfate | | | | Details |
| Batelco | Bahrain Telecommunications Co. | | | | Details |
| BBOSP | Burrowed, Bioturbated, Orbitolinid, Skeletal-Packstone | | | | Details |
| BBOSW | Burrowed, Bioturbated, Orbitolinid, Skeletal Wackestone | | | | Details |
| BDO | barrels diesel oil | | | | Details |
| BDOF | Bank Dhofar al-Omani al-Fransi | | | | Details |
| BFO | barrels frac oil | | | | Details |
| BHO | bottom-hole orientation | | | | Details |
| Big.nod. | Bigenerina nodosaria | | | | Details |
| BIMCO | The Baltic and International Maritime Conference | | | | Details |
| bio | biotite | | | | Details |
| BIOR | Biostratigraphic Range Log | | | | Details |
| BIORE | Biostratigraphy Study Report | | | | Details |
| BITOR | Bitumenes Orinoco S.A. Venezuela | | | | Details |
| bldo | bleeding oil | | | | Details |
| BLO | barrels of load oil | | | | Details |
| BLO | barrels load oil | | | | Details |
| blo | blow | | | | Details |
| BLOM | Banque du Liban et d’Outre-Mer | | | | Details |
| BLOPD | barrels of load oil per day | | | | Details |
| BLOPD | barrels load oil per day | | | | Details |
| BLOPH | barrels of load oil per hour | | | | Details |
| BLOPH | barrels load oil per hour | | | | Details |
| BLOR | barrels load oil recovered | | | | Details |
| Blos | blossom | | | | Details |
| BLOTBR | barrels load oil to be recovered | | | | Details |
| BLOYTR | barrels load oil yet to recover | | | | Details |
| BMAO | Bank Muscat al-Ahli al-Omani | | | | Details |
| BMOP | Build Model On Paper | | | | Details |
| BNO | barrels new oil | | | | Details |
| BNOCL | Barbados National Oil Company Ltd. Barbados | | | | Details |
| BO | Break Out | | | | Details |
| Bo | Oil Formation Volume Factor in Rb/STB | | | | Details |
| BO | Back Off Log | | | | Details |
| BO | Branch Office | | | | Details |
| Bo | Oil Formation Volume Factor | | | | Details |
| BO | Business Objects | | | | Details |
| BO | Explosive Service (Back-off) | | | | Details |
| BO | BELARUS | | | | Details |
| BO | BOLIVIA | | | | Details |
| BO | barrels of oil | | | | Details |
| BO | backed out(off ) | | | | Details |
| BO | barrels oil | | | | Details |
| BO | blew out | | | | Details |
| BO | blocked off | | | | Details |
| BO | free-point back off | | | | Details |
| BO | String Shot –Back Off | | | | Details |
| BO1 | Tubing | | | | Details |
| BO2 | Drill Pipe, Wash Pipe, Casing, Liners | | | | Details |
| BO3 | Drill Collars | | | | Details |
| BOB | Back on bottom | | | | Details |
| BOB | Bunker On Board | | | | Details |
| BOBK | Bank of Oman, Bahrain and Kuwait | | | | Details |
| BOC | Breach of Contract | | | | Details |
| BOC | base operations camp | | | | Details |
| BOCD | barrels oil per calendar day | | | | Details |
| BOCS | Basal Oil Creek Sand | | | | Details |
| BOD | Basis Of Design | | | | Details |
| BOD | Basic Operational Data | | | | Details |
| BOD | Biochemical Oxygen Demand | | | | Details |
| BOD | Biological Oxygen Demand | | | | Details |
| Bod | Bodcaw | | | | Details |
| BOD | Biologic Oxygen Demand | | | | Details |
| BOD5 | 5-day biological oxygen demand | | | | Details |
| BODF | Below Original Drill Floor | | | | Details |
| boe | barrel(s) of oil equivalent | | | | Details |
| BOE | Barrels of oil equivalent | | | | Details |
| BOE | barrels of oil equivalent A method of equating the energy produced by a hydrocarbon gas to a standard oil measurement One barrel of oil has about the same heat producing capacity as 6,000 ft3 of gas at standard conditions | | | | Details |
| BOE | bevel one end | | | | Details |
| BOE | blowout equipment | | | | Details |
| boed | barrel(s) of oil equivalent per day | | | | Details |
| BOEM | Bureau of Ocean Energy Management, DOI | | | | Details |
| BOEMRE | Bureau of Ocean Energy Management, Regulation and Enforcement | | | | Details |
| BOEMRE | Bureau of Ocean Energy Management, Regulation and Enforcement, DOI | | | | Details |
| boepd | barrel(s) of oil equivalent per day | | | | Details |
| BOL | Back On Line | | | | Details |
| BOL | BOLIVIA | | | | Details |
| Bol. | Bolivarensis | | | | Details |
| Bol.a. | Bolivina a. | | | | Details |
| Bol.flor. | Bolivina floridana | | | | Details |
| Bol.p. | Bolivina perca | | | | Details |
| BOM | Business Opportunity Manager | | | | Details |
| BOM | Bill of Materials | | | | Details |
| BOMA | ball out mud acid | | | | Details |
| BOMINFLOT | KG Bominflot Bunkergas fuer Mineraloele mbH & Co. Germany | | | | Details |
| Bonne | Bonneterre | | | | Details |
| BOOT | Build-Own-Operate-Transfer | | | | Details |
| BOP | Blowout Preventer | | | | Details |
| BOP | Bottom of Pipe | | | | Details |
| BOP | BOP/WH/HP system | | | | Details |
| BOP | Blow Out Preventer | | | | Details |
| bopd | barrel(s) of oil per day | | | | Details |
| BOPD | Barrels of Oil Per Day | | | | Details |
| BOPD | barrels oil per day | | | | Details |
| BOPE | blowout preventer equipment | | | | Details |
| BOPEC | Bonaire Petroleum Corporation Neth. Antilles | | | | Details |
| BOPH | barrels of oil per hour | | | | Details |
| BOPH | barrels oil per hour | | | | Details |
| BOPPD | barrels oil per producing day | | | | Details |
| BOQ | Bill Of Quantities | | | | Details |
| Borb | prefix denoting a number in billions | | | | Details |
| BORCO | Bahamas Oil Refining Co. Venezuela | | | | Details |
| BOREH | Borehole Seismic Analysis | | | | Details |
| Borouge | Abu Dhabi Polymers Company Limited | | | | Details |
| BOS | Bottom Of Screen | | | | Details |
| BOS | brown oil stain | | | | Details |
| BOSIET | Basic Safety Induction & Emergency Training (see comment) | | | | Details |
| BOSIET | Basic Offshore Safety Induction and Emergency Training | | | | Details |
| BOSS | ball operated shear sub | | | | Details |
| BOST | Battery-Operated Shut-In Tool | | | | Details |
| BOT | Build–Operate–Transfer | | | | Details |
| BOT | Baker Oil Tools | | | | Details |
| bot | bottom | | | | Details |
| BOTAS | BOTAS, Petroleum Pipeline Corp. Ltd. Turkey | | | | Details |
| BOTHL | Bottom Hole Locator Log | | | | Details |
| BOTTO | Bottom Hole Pressure/Temperature Report | | | | Details |
| BOUT | Breakout | | | | Details |
| BOV | Bleed Off Valve | | | | Details |
| Box | everyday term for container (or boxed vessel) | | | | Details |
| BOX | test batch test with oxygen addition | | | | Details |
| BPEO | Best Practicable Environmental Option | | | | Details |
| BPLO | barrels of pipeline oil | | | | Details |
| BPLOPD | barrels of pipeline oil per day | | | | Details |
| BPO | Before Pay Out | | | | Details |
| BRASPETRO | Petrobras Internacional S.A. Brazil | | | | Details |
| BROB | Bunkers Remaining On Board | | | | Details |
| Brom | bromide | | | | Details |
| BTO/C | break to open/close (valve torque) | | | | Details |
| BVO | ball valve operator | | | | Details |
| BWOB | by weight of the blend | | | | Details |
| BWOC | by weight of cement | | | | Details |
| BWOL | barrels water over load | | | | Details |
| BWON | Benzene Waste Operations NESHAP (40 CFR part 61, subpart FF) | | | | Details |
| BWOW | by weight of water | | | | Details |
| C O | Carbon Oxygen | | | | Details |
| C O | Carbon-Oxygen | | | | Details |
| C to C | center to center | | | | Details |
| C to E | center to end | | | | Details |
| C to F | center to face | | | | Details |
| C.O.P. | completed on pump | | | | Details |
| C/O | Change Out | | | | Details |
| c/o | care of | | | | Details |
| CaCO3 | calcium carbonate | | | | Details |
| CALOG | Circumferential Acoustic Log | | | | Details |
| CanOxy | Canadian Occidental Petroleum Ltd. | | | | Details |
| CAO | Computer Aided Operations | | | | Details |
| CaO | calcium oxcide | | | | Details |
| CAODC | Canadian Association of Oilwell Drilling Contractors | | | | Details |
| CAODS | Canadian Association of Oilwell Drilling Contractors | | | | Details |
| CAOF | calculated absolute open flow A theoretical figure of a wells maximum production | | | | Details |
| CAOF | calculated absolute open flow | | | | Details |
| CaSO4 | calcium sulfate | | | | Details |
| Casoc | California Arabian Standard Oil Company | | | | Details |
| CBO | Commercial Bank of Oman | | | | Details |
| CCCOP | Conservation Committee of California Oil Producers | | | | Details |
| CCLGO | cat-cracked light gas oil | | | | Details |
| CCMO | Credit Commercial du Moyen Orient | | | | Details |
| CDO | certified drawing outline | | | | Details |
| Ceno | Cenozoic | | | | Details |
| CEPCO | City Ecuadoriana Production Co. Ecuador | | | | Details |
| CFBO | companion flanges bolted on | | | | Details |
| CGOC | Current Gas Oil Contact | | | | Details |
| CH-OP | chain operated | | | | Details |
| CHOPS | Cold Heavy Oil Production with Sand | | | | Details |
| CHOPT | CHarterer's OPTion | | | | Details |
| Chou | Chouteau lime | | | | Details |
| CHROM | Chromatolog | | | | Details |
| chromat | chromatograph | | | | Details |
| chrome | chromium | | | | Details |
| CIPCO | Caspian International Petroleum Company | | | | Details |
| CIT-OA | casing integrity test – outside annulus | | | | Details |
| ClO2 | chlorine dioxide, a powerful biocide that dissolves biomass cell walls It is nearly impossible for bacteria to develop immunity against ClO2 | | | | Details |
| Clov | clovery | | | | Details |
| CMOP | Choke Manifold Operating Pressure | | | | Details |
| CNLOPB | Canada-Newfoundland and Labrador Offshore Petroleum Board | | | | Details |
| CNOC | China National Oil Company | | | | Details |
| CNODC | China National Oil & Gas Exploration & Development Corp. (see CSPC) China | | | | Details |
| CNOOC | China National Offshore Oil Corporation China | | | | Details |
| CNSOPB | Canada Nova Scotia Offshore Petroleum Board | | | | Details |
| CNSOPB | Canada-Nova Scotia Offshore Petroleum Board | | | | Details |
| CO | change out (ex. from rod equipment to casing equipment) | | | | Details |
| CO | COLOMBIA | | | | Details |
| CO | circulate out, mud logging term | | | | Details |
| CO | carbon monoxide | | | | Details |
| Co | cobalt | | | | Details |
| CO | Colorado | | | | Details |
| Co | Company | | | | Details |
| co | clean out or cleaning out | | | | Details |
| CO | Carbon Dioxide | | | | Details |
| CO | carbon oxygen | | | | Details |
| CO | circulated out | | | | Details |
| CO | clean out | | | | Details |
| CO | cleaning out, cleaned out | | | | Details |
| CO | crude oil | | | | Details |
| CO & S | clean out & shoot | | | | Details |
| Co. | Op. company operated | | | | Details |
| Co. | Op. S.S. company-operated service stations | | | | Details |
| CO2 | Carbon Dioxide | | | | Details |
| CO2e | carbon dioxide equivalent | | | | Details |
| COA | Contract Of Affreightment | | | | Details |
| CoA | Chart of Accounts | | | | Details |
| COACP | Contract Of Affreightment Charter Party | | | | Details |
| Coal | sedimentary rock, often highly naturally fractured, composed of thermally modified plant remains | | | | Details |
| cob | Close Of Business (day) | | | | Details |
| COBLDN | Closing Of Business LoDoN | | | | Details |
| COBOL | Common Business Oriented Language | | | | Details |
| COBOL | Common Business-Oriented Language | | | | Details |
| CoC | Code of Conduct | | | | Details |
| COC | Certificate of Conformance | | | | Details |
| COC | Cleveland open cup | | | | Details |
| COCHIME | Companie Chimique de la Mediterranee France | | | | Details |
| Coco | Coconino | | | | Details |
| COD | Cash On Delivery | | | | Details |
| COD | Chemical Oxygen Demand | | | | Details |
| COD | CONGO, THE DEMOCRATIC REPUBLIC OF THE | | | | Details |
| COD | Carbon Dioxide Deepening | | | | Details |
| Cod | Codell | | | | Details |
| CODEC | COder DECoder | | | | Details |
| CODESSAS | Cia. Operadora de Estaciones de Servicio S.A. de CV Mexico | | | | Details |
| COE | Center Of Excellence | | | | Details |
| COE | controllable operating expense | | | | Details |
| COE | Corps of Engineers | | | | Details |
| CoED | Chance of Economical Development | | | | Details |
| coef | coefficient | | | | Details |
| CoF | Certificate of Fitness (final part of medical check) | | | | Details |
| COF | Coefficient of Fraction | | | | Details |
| COF | calculated open flow | | | | Details |
| COF | calculated open flow(potential) | | | | Details |
| COFCAW | a tertiary recovery mechanist consisting of combustion and water flooding | | | | Details |
| COG | CONGO | | | | Details |
| COG | coke oven gas | | | | Details |
| COGA | Colorado Oil & Gas Association | | | | Details |
| Cogec | Costieri Genovesi Petroliferi | | | | Details |
| COGSA | Carriage of Goods by Sea Act | | | | Details |
| COH | With Openhole Data Included | | | | Details |
| COK | COOK ISLANDS | | | | Details |
| COL | Collar Log | | | | Details |
| COL | Cost Of Living | | | | Details |
| COL | COLOMBIA | | | | Details |
| COL | collar | | | | Details |
| COL | colored | | | | Details |
| COL | column | | | | Details |
| Col | ASTM Color American Standard Test Method | | | | Details |
| Cole | Jct Coleman Junction | | | | Details |
| coll | collect(ed)(ing)(ion) | | | | Details |
| Colloq | Colloquial (means informal) | | | | Details |
| COLPET | Colombian Petroleum Co. Colombia | | | | Details |
| colr | collar | | | | Details |
| COM | Completion | | | | Details |
| COM | COMOROS | | | | Details |
| Com | Comanche | | | | Details |
| Com | Comatula | | | | Details |
| com | common | | | | Details |
| Com | Pk Comanche Peak | | | | Details |
| Com AVL | Compensated Acoustic Velocity Log | | | | Details |
| Com AVL-G | Compensated Acoustic Velocity | | | | Details |
| Com AVL-N | Compensated Acoustic Velocity | | | | Details |
| Com Den | Compensated Density | | | | Details |
| Com Den-GR | Compensated Density Gamma Ray | | | | Details |
| COMAN | Compositional Analysis | | | | Details |
| comb | combined, combination | | | | Details |
| COMB | combustion | | | | Details |
| COMESA | Cie. Mexicana de Exploraciones S.A. Mexico | | | | Details |
| COMGAS | Companhia de Gas de Sao Paolo Brazil | | | | Details |
| COML | Compaction Log | | | | Details |
| coml | commercial | | | | Details |
| Comm | community, communitized | | | | Details |
| comm | commenced | | | | Details |
| comm | commission | | | | Details |
| comm | communication | | | | Details |
| comm | community | | | | Details |
| COMMEGO | Committee on Geology & Mineral Resources Bulgaria | | | | Details |
| commr | commissioner | | | | Details |
| COMP | Composite Log | | | | Details |
| Comp | complete, completion, completed | | | | Details |
| comp | complete(ed)(tion) | | | | Details |
| comp | nat completed natural | | | | Details |
| compnts | components | | | | Details |
| COMPR | Completion Program Report | | | | Details |
| compr | compressor | | | | Details |
| compr | st compressor station | | | | Details |
| compt | compartment | | | | Details |
| COMPT | components | | | | Details |
| COMPTR | computer | | | | Details |
| COMPU | Computest Report | | | | Details |
| COMRE | Completion Record Log | | | | Details |
| COMT | comment | | | | Details |
| COMUT | commutator | | | | Details |
| CON | Condensate | | | | Details |
| con | consolidated | | | | Details |
| Con Dr. | Continuous Drift | | | | Details |
| conc | concentrate | | | | Details |
| conc | concentric | | | | Details |
| conc | concrete | | | | Details |
| CONCAWE | Conservation of Clean Air and Water in Europe | | | | Details |
| CONCAWE | Oil companies’ European organization for environment, health and safety Belgium | | | | Details |
| conch | conchoidal | | | | Details |
| concl | conclusion | | | | Details |
| cond | condensate | | | | Details |
| cond | condition(ed)(ing) | | | | Details |
| CONDE | Condensate Analysis Report | | | | Details |
| CONDR | Continuous Directional Log | | | | Details |
| condr | conductor ( csq) | | | | Details |
| condr | conductor(pipe) | | | | Details |
| condt | conductivity | | | | Details |
| conf | confidential | | | | Details |
| conf | confirm(ed)(ing) | | | | Details |
| confl | conflict | | | | Details |
| cong | conglomerate(itic) | | | | Details |
| congl | conglomerate (itic) | | | | Details |
| congl | conglomerate | | | | Details |
| CONL | Contact | | | | Details |
| conn | connection | | | | Details |
| cono | conodonts | | | | Details |
| CONOCO | Continental Oil Co. | | | | Details |
| consol | consolidated | | | | Details |
| CONSPAIN | Continental Oil Co. of Spain (Conoco Espanola, S.A.) Spain | | | | Details |
| const | constant | | | | Details |
| const | construction | | | | Details |
| consv | conserve, conservation | | | | Details |
| CONT | CONTainer | | | | Details |
| Cont | Contact Caliper | | | | Details |
| cont(d) | continue(ed) | | | | Details |
| contam | contaminated, contamination | | | | Details |
| contd | continued | | | | Details |
| Contr | contractor | | | | Details |
| contr | resp contractor responsibility | | | | Details |
| contrib | contribution | | | | Details |
| conv | converse | | | | Details |
| CONVT | convector, convection | | | | Details |
| COOH | coming out of hole | | | | Details |
| COOP | Societe Cooperative Des Petroles Egypt | | | | Details |
| co-op | cooperative | | | | Details |
| coord | coordinates | | | | Details |
| coord | coordinate | | | | Details |
| COP | Communitee Of Practice | | | | Details |
| COP | Custom Of Port | | | | Details |
| COP | crude oil purchasing | | | | Details |
| COPAREX | Companie de Participations, de Recherches et d’Exploitations Petrolieres France | | | | Details |
| COPAS | Council of Petroleum Accountants Society | | | | Details |
| COPs | Codes of Practice | | | | Details |
| coq | coquina | | | | Details |
| COR | Coring Run | | | | Details |
| cor | corner | | | | Details |
| COR | Carbon Dioxide Redrill | | | | Details |
| Cor Det | Electro-Magnetic Corrosion Detector | | | | Details |
| CORAN | Core Analysis Report | | | | Details |
| CORC | Cairo Oil Refining Company Egypt | | | | Details |
| CORCO | Commonwealth Oil Refining Co., Inc. | | | | Details |
| CORE | Core Report | | | | Details |
| CORG | Corgun Log | | | | Details |
| CORIB | Coriband Log | | | | Details |
| CORL | Correlation | | | | Details |
| CORLG | Correlation Log | | | | Details |
| COROR | Core Orientation Report | | | | Details |
| Corp | corporation | | | | Details |
| corr | corrected, correction | | | | Details |
| corr | correct(ed)(ion) | | | | Details |
| corr | corrosion | | | | Details |
| corr | corrugated | | | | Details |
| correl | correlation, correlated | | | | Details |
| correl | correlation | | | | Details |
| corres | correspondence | | | | Details |
| CORS | Canadian Operational Research Society | | | | Details |
| COS | Class of Service | | | | Details |
| COS | Canadian Oil Sands | | | | Details |
| COS | Call Out Service | | | | Details |
| COS | carbonyl sulfide | | | | Details |
| COS | Chance of Success | | | | Details |
| COSA | Crude Oil Sales Agreement | | | | Details |
| COSH | hyperbolic cosine | | | | Details |
| COSHH | Control of Substances Hazardous to Health | | | | Details |
| COSMO | Japan | | | | Details |
| COTD | cleaned out to total depth | | | | Details |
| COTH | hyperbolic cotangent | | | | Details |
| Cott | G Cottage Grove | | | | Details |
| Counc | G Council Grove | | | | Details |
| COVA | Netherlands National Petroleum Stockpiling Agency (Stichting Centraal Orgaan Voorraadvorming Aardolieprodukten) Netherlands | | | | Details |
| COW | Crude Oil Washing (for oil pollution recovery from the ocean) | | | | Details |
| COW | Crude Oil Washing | | | | Details |
| COWC | Current Oil Water Contact | | | | Details |
| COX | Carbon Dioxide Recompletion | | | | Details |
| COXY | Carbon/Oxygen Log | | | | Details |
| CPO | confirming telephone order | | | | Details |
| CROB | Cargo Remaining OnBoard | | | | Details |
| Crom | Cromwell | | | | Details |
| crypto-xln | cryptocrystalline | | | | Details |
| CsCOOH | cesium formate | | | | Details |
| CSO | Capital Staff Overhead | | | | Details |
| CSO | complete seal-off | | | | Details |
| CTCO | Coiled Tubing Clean Out | | | | Details |
| CTO | confirming telephone order | | | | Details |
| CTOD | crack tip opening displacement | | | | Details |
| Cut Oil | cutting oil | | | | Details |
| Cut Oil Act | cutting oil active-sulfurized-dark | | | | Details |
| Cut Oil Act | cutting oil active-sulfurized-transparent | | | | Details |
| Cut Oil | cutting oil inactive-sulfurize | | | | Details |
| Cut Oil Sol | cutting oil soluble | | | | Details |
| Cut Oil St Mrl | cutting oil straight mineral | | | | Details |
| CWOP | Coring the Well On Paper | | | | Details |
| CWOP | Complete Well On Paper | | | | Details |
| CWOP | complete well on paper exercise | | | | Details |
| CWOR | Completion Work Over Riser | | | | Details |
| CWOR | completion and workover riser | | | | Details |
| CYPRO | Cyberproducts Log | | | | Details |
| D.O. | division order | | | | Details |
| D/O | division office | | | | Details |
| DANOP | Dansk Operatorselskab Denmark | | | | Details |
| DBO | dark brown oil | | | | Details |
| DBOS | dark brown oil stains | | | | Details |
| DECON | Deconvolution | | | | Details |
| deisobut | deisobutanizer | | | | Details |
| Deoco | Deminex Egypt Company | | | | Details |
| deprop | depropanizer | | | | Details |
| DERPROSA | Derivados del Propileno S.A. Spain | | | | Details |
| desorb | desorbent | | | | Details |
| DFFO | Diagnostic fracture fall-off (also called DFIT) | | | | Details |
| DFO | datum faulted out | | | | Details |
| dichlor | dichloride | | | | Details |
| DICOL | Distribuidora de Combustiveis e Lubrificantes da Guinea Bissau Lda. Portugal | | | | Details |
| DIGAQRO | Distribuidora de Gas de Queretaro S.A. Mexico | | | | Details |
| DIO | Days Invoice Outstanding | | | | Details |
| DIOCO | DEMINEX Egypt Co. Egypt | | | | Details |
| DISO | Dual Induction Sonic Log | | | | Details |
| DLOSP | Dropping Last Outwards Sea Pilot (Norway) | | | | Details |
| DMO | Dip Move Out | | | | Details |
| DMOR | Daily Moving Report | | | | Details |
| DNHO | Downhole Logging | | | | Details |
| DNO | Det Norske Oljeselskap A/S Norway | | | | Details |
| DO | Depth offset (SLB wireline correlation) | | | | Details |
| DO | Diesel Oil | | | | Details |
| DO | Decision Owner | | | | Details |
| DO | DOMINICA | | | | Details |
| DO | DOMINICAN REPUBLIC | | | | Details |
| DO | drill (ed) out | | | | Details |
| DO | Development oil | | | | Details |
| DO | development oil well | | | | Details |
| do | ditto | | | | Details |
| DO | drill(ed)(ing) out | | | | Details |
| DOA | delegation of authority | | | | Details |
| DOAMS | Digital OilField and Asset Management System | | | | Details |
| DOB | Date Of Birth | | | | Details |
| DOBLDG | dock operating building | | | | Details |
| DOC | Declaration Of Commerciality | | | | Details |
| DOC | Daniel Oil Calculation | | | | Details |
| DOC | drilled or drilling out cement | | | | Details |
| DOC | diesel oil well | | | | Details |
| Doc | Dockum | | | | Details |
| doc | document | | | | Details |
| DOC | drilled-out cement | | | | Details |
| DOCREQ | Document request | | | | Details |
| doc-tr | doctor-treatment | | | | Details |
| DOD | Dead Oil Displacement (Subsea) | | | | Details |
| DOD | drilled-out depth | | | | Details |
| DODC | Development Operations Coordination Document (US Govt GoM Well Permit applic form) | | | | Details |
| DODI | Diamond Offshore Drilling company | | | | Details |
| DOE | Depends On Experience | | | | Details |
| DOE | Department of Energy, United States | | | | Details |
| DOE | Date of Engagement | | | | Details |
| DOE | US Department Of Energy | | | | Details |
| DOE | U.S. Department of Energy | | | | Details |
| DOE | Department of Energy | | | | Details |
| DOFF | Digital Oil Field of the Future | | | | Details |
| DOG | Dogleg | | | | Details |
| DOI | Digital Object Identifier | | | | Details |
| DOI | Department of the Interior | | | | Details |
| DOI | U.S. Department of the Interior | | | | Details |
| DOL | Dolomite | | | | Details |
| dolo | dolomite | | | | Details |
| dolo | dolomite(ic) | | | | Details |
| DOLSP | Dropping Off Last Sea Pilot ( Norway) | | | | Details |
| dolst | dolstone | | | | Details |
| DOM | Depth Orientation Marker (weatherford tool, see comment) | | | | Details |
| DOM | DOMINICAN REPUBLIC | | | | Details |
| dom | domestic | | | | Details |
| dom | AL domestic airline | | | | Details |
| DOM | WTR domestic water | | | | Details |
| DOME | Dome | | | | Details |
| DONG | Dansk Olie og Naturgas A/S Denmark | | | | Details |
| DOP | Dropping Outward Pilot | | | | Details |
| DOP | drilled out plug | | | | Details |
| DOP | drilled-out plug | | | | Details |
| dope | Pipe coating | | | | Details |
| DOR | Daily Operations Report | | | | Details |
| Dorn | H Dornick Hills | | | | Details |
| DOT | U.S. Department of Transportation (DOT transporatable - approval needed for transport) | | | | Details |
| DOT | Department Of Transport | | | | Details |
| DOT | U.S. Department of Transportation | | | | Details |
| DOT | Department of Transportation | | | | Details |
| DOT-E | Designation Of Material Exempt from Department of Transportation regulations | | | | Details |
| Doth | Dothan | | | | Details |
| Doug | Douglas | | | | Details |
| DOW | Days On Well (number of days passed dealing with operations) | | | | Details |
| DOWRE | Downhole Report | | | | Details |
| doz | dozen | | | | Details |
| DRLOG | Drilling Log | | | | Details |
| DRODB | drilling, recompletion and repair data base | | | | Details |
| dropd | dropped | | | | Details |
| DSO | Days Sale Outstanding | | | | Details |
| DSO | dead oil show | | | | Details |
| DTCO | Sonic Compressional | | | | Details |
| DUPETCO | Dubai Petroleum Co. Dubai | | | | Details |
| DWO | drilling with oil | | | | Details |
| DWOP | Drilling Well on Paper (a theoretical exercise conducted involving the Service provider managers) | | | | Details |
| DWOP | Drill Well On Paper | | | | Details |
| DWOP | drill well on paper exercise | | | | Details |
| DYNPOS | Dynamic Positioning | | | | Details |
| E of W/L | east of west line | | | | Details |
| E&P-FORUM | Oil Industry Intenational Exploration & Production Forum UK | | | | Details |
| E/O | east offset | | | | Details |
| EAOC | Exxon Azerbaijan Operating Company | | | | Details |
| ECMOR | European Conference on the Mathematics of Oil Recovery | | | | Details |
| ECO | Ecoscope | | | | Details |
| Econ | economics, economy, economizer | | | | Details |
| ECOPETROL | Empresa Colombiana de Petroleos Colombia | | | | Details |
| ECoS | Economical Chance of Success | | | | Details |
| EEPROM | Electrically Erasable (user) Programmable Read-Only Memory | | | | Details |
| EMAGEO | Entreprise Nationale de Geophysique Algeria | | | | Details |
| EMALCO | Empresa Almacenadora de Combustibles Ltda. Chile | | | | Details |
| EMO | Electromagnetic Orientation Tool | | | | Details |
| EMOP | EMOP Well Site Processing Log | | | | Details |
| ENACOL | Empresa Nacionale de Combustiveis, SARL Cape Verde | | | | Details |
| ENAFOR | Entreprise Nationale de Forage Algeria | | | | Details |
| endo | endothyra | | | | Details |
| ENOC | Emirates National Oil Company | | | | Details |
| EO | emergency order | | | | Details |
| EOA | End Of Assembly (Completion) | | | | Details |
| EOB | End Of Build (Drilling) | | | | Details |
| EOB | end of build (horizontal wellbore) | | | | Details |
| EOC | Equivalent Oil Column | | | | Details |
| EOC | end of curve | | | | Details |
| Eoc | Eocene | | | | Details |
| EOF | End Of File | | | | Details |
| EOF | End of | | | | Details |
| EOFL | End of Field Life | | | | Details |
| EOI | Expression of Interest | | | | Details |
| EOL | end of line | | | | Details |
| EOM | end of month | | | | Details |
| EONIA | Euro OverNight Index Average | | | | Details |
| EOP | Extreme Overbalanced Perforating | | | | Details |
| EOP | Edinburgh Oil & Gas plc UK | | | | Details |
| EOQ | end of quarter | | | | Details |
| EOR | Enhanced Oil Recovery | | | | Details |
| EOR | east of Rockies | | | | Details |
| EOS | Equation Of State | | | | Details |
| EOT | End Of Tubing | | | | Details |
| EOW | End Of Well Report | | | | Details |
| EOWR | End Of Well Report | | | | Details |
| EOY | end of year | | | | Details |
| Epedeco | Egyptian Petroleum Development Company | | | | Details |
| EPICO | Engineer Procure Install Construct Operate | | | | Details |
| EPIDORIS | Exploration and Production Integrated Drilling Operations and Reservoir Information System | | | | Details |
| EPOD | Expanded Plan of Development | | | | Details |
| Epon. | Eponides | | | | Details |
| Epon. | y. Eponides yeguaensis | | | | Details |
| EROEI | Energy return on energy invested | | | | Details |
| ESSO | REP Societe Esso de Recherches et Exploitation Petrolieres France | | | | Details |
| EUROCORD | European Federation of Twine, Cordage and Netting Industries | | | | Details |
| EUROGAS | European Union of the Natural Gas Industry Belgium | | | | Details |
| EUROGIF | European Oil and Gas Innovation Forum | | | | Details |
| EUROPIA | European Petroleum Industry Assn. | | | | Details |
| EVOI | Early Value Of Information | | | | Details |
| ev-sort | even sorted | | | | Details |
| explos | explosive | | | | Details |
| F to F | face to face | | | | Details |
| F.O.E | fuel oil equivalent | | | | Details |
| F/GOR | formation gas-oil ratio | | | | Details |
| F/O | opt farmout option | | | | Details |
| FACO | field authorized to commence operations | | | | Details |
| FAO | finish all over | | | | Details |
| FARO | flow at rate of | | | | Details |
| FARO | flowed(ing) at the rate of | | | | Details |
| Fbio | site-specific fraction of organic compounds biodegraded | | | | Details |
| FCO | functional check out | | | | Details |
| FCOL | Fluid Coloration (see comment!) | | | | Details |
| FCON | Fluid Conductivity Log | | | | Details |
| FDO | Field Development Options | | | | Details |
| FDPSO | Floating Drilling Production Storage Offloading host | | | | Details |
| FDPSO | Floating Drilling, Production, Storage and Offloading Vessel | | | | Details |
| Fe2(SO4)3 | ferric sulfate | | | | Details |
| FeCO3 | iron carbonate scale | | | | Details |
| FeOH | iron hydroxide gel (a precipitate after acid spends) | | | | Details |
| FFO | furnace fuel oil | | | | Details |
| FGEOL | Final Geological Report | | | | Details |
| FGOR | flowing gas oil ratio | | | | Details |
| FIFO | First In First Out | | | | Details |
| FINCO | Finance Committee | | | | Details |
| FIO | Free In and Out | | | | Details |
| FIOC | First International Oil Company Kazakhstan | | | | Details |
| FIOST | Free In and Out Stowed and Trimmed | | | | Details |
| FIOT | Free In and Out Trimmed | | | | Details |
| Fl-COC | flash point, Cleveland Open Cup | | | | Details |
| FLO | Flow Meter | | | | Details |
| FLO | Fluid Travel | | | | Details |
| FLO | Nuclear Flow | | | | Details |
| FLO | Subsurface Injector | | | | Details |
| FLO | Flo Meter | | | | Details |
| flo | flow | | | | Details |
| FLO | flushing oil | | | | Details |
| FLO | Flowmeter | | | | Details |
| FLOG | FLOG PHIX RHGX Log | | | | Details |
| FLOPR | Flow Profile Report | | | | Details |
| Flor | fl Florence flint | | | | Details |
| FLOT | Flying Lead Orientation Tool | | | | Details |
| FLOW | Flow & Buildup Test Report | | | | Details |
| FLSO | Liquefaction Storage and Offloading (vessel) | | | | Details |
| fluor | fluorescence, fluorescent | | | | Details |
| FLUORAZ | a high performance elastomer for seal assemblies | | | | Details |
| FO | Fibre Optic | | | | Details |
| FO | First Oil | | | | Details |
| FO | For Orders | | | | Details |
| FO | FAROE ISLANDS | | | | Details |
| FO | full opening | | | | Details |
| FO | farmout | | | | Details |
| FO | faulted out | | | | Details |
| FO | final open | | | | Details |
| FO | fuel oil | | | | Details |
| FO | Farm Out | | | | Details |
| FO (IFO) | Fuel Oil | | | | Details |
| FOB | Free On Board | | | | Details |
| FOC | field operations center | | | | Details |
| FOCL | Focus | | | | Details |
| FOCL | focused log | | | | Details |
| FOD | First Oil Date | | | | Details |
| FOET | further offshore emergency training | | | | Details |
| FOE-WOE | flanged one end, welded one end | | | | Details |
| FOG | For Our Guidance | | | | Details |
| FOH | full open head | | | | Details |
| FOK | Filter Oberkante | | | | Details |
| Fol | foliated | | | | Details |
| FONSI | finding of no significant impact | | | | Details |
| FOP | PG-Zange | | | | Details |
| FOP | Fuel oil price | | | | Details |
| FOQ | Free On Quay | | | | Details |
| FOR | Free On Rail | | | | Details |
| FOR | fuel oil return | | | | Details |
| Forak | Foraker | | | | Details |
| Foram | foraminifera | | | | Details |
| formation | evaluation | | | | Details |
| Fort | Fortura | | | | Details |
| FORTRAN | Formula Translation | | | | Details |
| FoRxo | FoRxo Caliper | | | | Details |
| FOS | face of stud | | | | Details |
| FOS | fuel oil supply | | | | Details |
| foss | fossiliferous | | | | Details |
| FOSV | Full Opening Safety Valve | | | | Details |
| FOT | Free On Truck | | | | Details |
| FOT | Tbg-Zange (Foster Tong) | | | | Details |
| FOT | flowing on test | | | | Details |
| Fount | Fountain | | | | Details |
| FOW | First Open Water | | | | Details |
| FOW | Free On Wharf | | | | Details |
| Fox H | Fox Hills | | | | Details |
| FPO | field purchase order | | | | Details |
| FPOS | First Person On Site | | | | Details |
| FPSO | Floating Production Storage and Offloading vessel | | | | Details |
| FPSO | Floating Production Storage and Offloading unit | | | | Details |
| FPSO | Floating Production Storage and Offloading | | | | Details |
| FPSO | Floating, Production, Storage and Offloading | | | | Details |
| FPSO | floating production, storage and offloading An alternative to pipelines | | | | Details |
| FPSO | Floating Production, Storage and Offloadlna Vessel | | | | Details |
| FRO | FAROE ISLANDS | | | | Details |
| Fron | frontier | | | | Details |
| fros | frosted | | | | Details |
| Froth | a foam with very high internal gas volume, usually 90%+ gas High viscosity and often very stable | | | | Details |
| FSO | Floating Storage Offloading vessel | | | | Details |
| FSO | Full Scale Output | | | | Details |
| FWKO | Free water knock out | | | | Details |
| FWKO | see Free Water Knockout | | | | Details |
| G&MCO | gas & mud cut oil | | | | Details |
| G&MCO | gas & mud-cut oil | | | | Details |
| G&O | gas and oil | | | | Details |
| G&OCM | gas & oil cut mud | | | | Details |
| G&OCM | gas- and oil-cut mud | | | | Details |
| G/R OH | Gamma Ray-Open Hole | | | | Details |
| GAOCMAO | Gulf Area Oil Companies Mutual Aid Organization (—) | | | | Details |
| GAPPCO | Gas Processing and Pipeline Company | | | | Details |
| Gasco | Gas Industries Company | | | | Details |
| GASCO | Abu Dhabi Gas Industries Ltd | | | | Details |
| GASCO | Abu Dhabi Gas Industries Ltd. Abu Dhabi | | | | Details |
| GASCO | Egyptian Natural Gas Co. Egypt | | | | Details |
| gaso | gasoline | | | | Details |
| GATOIL | Subsidiary of NOC Libya Libya | | | | Details |
| GAZPROM | RAO Gazprom (former USSR Ministry of Gas Production) Russia | | | | Details |
| GCLO | gas cut load oil | | | | Details |
| GCLO | gas-cut load oil | | | | Details |
| GCLOG | Graphic Core Log | | | | Details |
| GCO | gas cut oil | | | | Details |
| GCO | gas-cut oil | | | | Details |
| GCoS | Geological Chance of Success | | | | Details |
| GEISO | Geisum Oil Company Egypt | | | | Details |
| GEO | GeoScience Conference for Middle East | | | | Details |
| GEO | GEORGIA | | | | Details |
| Geo | Georgetown | | | | Details |
| geo | geothermal | | | | Details |
| GEO | Geophone | | | | Details |
| GEOCH | Geochemical Evaluation | | | | Details |
| GEODY | GEO DYS Log | | | | Details |
| GEOEV | Geochemical Evaluation Report | | | | Details |
| GEOFO | Geological & Formation Evaluation Report | | | | Details |
| GEOL | Geological Surveillance Log | | | | Details |
| Geol | geologist | | | | Details |
| geol | geology(ist)(ical) | | | | Details |
| GEOP | Geophone Data Log | | | | Details |
| GEOP | Geophone | | | | Details |
| geop | geophysics(ical) | | | | Details |
| GEOPLIN | Slovenian Gas Company Slovenia | | | | Details |
| GEOPN | Geological Well Prognosis Report | | | | Details |
| GEOPR | Geological Operations Progress Report | | | | Details |
| GEORE | Geological Report | | | | Details |
| GEOROT | GEOgraphical ROTation | | | | Details |
| GeoTap | GeoTap Formation Tester | | | | Details |
| GFPSO | Global Floating Production Storage and Offloading | | | | Details |
| GHO | gallons heavy oil | | | | Details |
| GHOST | Gas Holdup Optical Sensor Tool in PLT/PSP tool of Schlumberger | | | | Details |
| GIGO | Garbage In Garbage Out | | | | Details |
| GIGO | Garbage In, Garbage Out | | | | Details |
| GIO | Gulf Investment Organization Kuwait/GCC | | | | Details |
| GISCO | Gas Investments and Service Company Ltd. | | | | Details |
| GLO | gas lift oil | | | | Details |
| GLO | General Land Office(Texas) | | | | Details |
| Glob | Globigerina | | | | Details |
| Glor | Glorieta | | | | Details |
| GNPOC | Greater Nile Petroleum Operating Co. Egypt | | | | Details |
| GO | Gas Oil | | | | Details |
| GO | GLORIOSO ISLANDS | | | | Details |
| GO | Geothermal Development-Failure | | | | Details |
| GO | gallons oil | | | | Details |
| GO | gas odor | | | | Details |
| GO | grind out | | | | Details |
| G-O2 | gaseous oxygen | | | | Details |
| GOC | Gas Oil Contact | | | | Details |
| GOC | gas / oil contact | | | | Details |
| GOC | gas-oil contact | | | | Details |
| GOD | Geothermal Development Deepening | | | | Details |
| GODT | gas odor distillate taste | | | | Details |
| GOEV | Gas Öl Verhältnis | GOR - Gas Oil Ratio | | | Details |
| GOG | Global Operations Geology | | | | Details |
| GOGD | Gas Oil Gravity Drainage | | | | Details |
| GoI | Government of India | | | | Details |
| Gol | Golconda lime | | | | Details |
| GOM | Gulf of Mexico | | | | Details |
| GOMEX | Gulf of Mexico | | | | Details |
| Good | L Goodland | | | | Details |
| GOP | Geological Operations Report | | | | Details |
| GOPD | gallons of oil per day | | | | Details |
| GOPH | gallons of oil per hour | | | | Details |
| GOQ | GLORIOSO ISLANDS | | | | Details |
| GOR | Gas-Oil-Ratio | | | | Details |
| GOR | Gas Oil Ratio | | | | Details |
| GOR | gas / oil ratio May refer to a solution GOR or total GOR | | | | Details |
| GOR | Gas to Oil Ratio | | | | Details |
| GOR | gas-oil ratio | | | | Details |
| Gor | Gorham | | | | Details |
| GOS | gulf of Suez | | | | Details |
| GOSI | General Organization for Social Insurance | | | | Details |
| GOSP | Gas/Oil Separation Plant | | | | Details |
| GOSP | Gas-Oil Separation Plant | | | | Details |
| GOSP | Gas Oil Separation Plant | | | | Details |
| GOT | German Oil Tools (a service company) | | | | Details |
| Gouldb | Gouldbusk | | | | Details |
| GOV | Gas Outlet Valves | | | | Details |
| gov | governor | | | | Details |
| GÖV | Gas Öl Verhältnis | GOR - Gas Oil Ratio | | | Details |
| govt | government | | | | Details |
| GR/N OH | Gamma Ray Neutron-Open Hole | | | | Details |
| Granos | Graneros | | | | Details |
| GRLOG | Grapholog | | | | Details |
| GSO | gas shut-off | | | | Details |
| GSO | good show of oil | | | | Details |
| GSO | good show oil | | | | Details |
| GSO&G | good show oil & gas | | | | Details |
| GSO&G | good show oil and gas | | | | Details |
| GTO | General Telecommunications Organization | | | | Details |
| Gumbo | sticky, reactive shale formation | | | | Details |
| Gupco | Gulf of Suez Petroleum Company | | | | Details |
| GUPCO | Gulf of Suez Petroleum Co. Egypt | | | | Details |
| GWO | Geothermal Wildcat-Success | | | | Details |
| GYRO | GvTo Survev | | | | Details |
| GYRO | Gyro Survey | | | | Details |
| GyroHDS1 | Gyro High-Speed Directional Survey | | | | Details |
| H. O. | hole opener | | | | Details |
| H2SO4 | sulfuric acid | | | | Details |
| HAZIO | Hazard and Operability Analysis | | | | Details |
| HAZOP | Hazardous Operation | | | | Details |
| HAZOP | hazardous operations | | | | Details |
| HCGO | heavy coker gas oil | | | | Details |
| HClO2 | chlorine dioxide, a bacteria killer | | | | Details |
| HCO | heavy cycle oil | | | | Details |
| HELIOS | Ste. Pour la Construction et l’Exploitation d’une Usine d’Helium Liquide et d’Azote Algeria | | | | Details |
| HFO | hole full of oil | | | | Details |
| HFO | heavy fuel oil | | | | Details |
| HGO | Heavy Grade Oils | | | | Details |
| HGOR | High Gas Oil Ratio | | | | Details |
| HGOR | high gas-oil ratio | | | | Details |
| HiPo | High Potantial (HSE term wrt to high potantial incident) | | | | Details |
| HISPANOIL | Hispanica de Petroleos, S.A. (see Repsol) Spain | | | | Details |
| HLO | Heavy Load-out (Facility) | | | | Details |
| HLO | Helicopter Landing Officer | | | | Details |
| HLO | Helicopter Landing Officer (jobrole/trainingcourse) | | | | Details |
| HO | Hole Opener | | | | Details |
| HO | Cargo HOld | | | | Details |
| HO | HONDURAS | | | | Details |
| HO | heating oil | | | | Details |
| HO | heavy oil | | | | Details |
| HO | home office | | | | Details |
| HO&GCM | heavily (highly) oil & gas cut mud | | | | Details |
| HO&GCM | heavily(highly) oil- and gas-cut mud | | | | Details |
| HOC | Hazard Observation Caused | | | | Details |
| HOC | Hindustan Organic Chemicals Ltd. India | | | | Details |
| hock | hockleyensis | | | | Details |
| HOCM | heavily (highly) oil cut mud | | | | Details |
| HOCM | heavily(highly) oil-cut mud | | | | Details |
| HOCSW | heavily (highly) oil cut salt water | | | | Details |
| HOCSW | heavily(highly) oil-cut salt water | | | | Details |
| HOCW | heavily (highly) oil cut water | | | | Details |
| HOCW | heavily(highly) oil-cut water | | | | Details |
| Hodp | Hospah | | | | Details |
| HOF | Home Office | | | | Details |
| Hog | Hogshooter | | | | Details |
| holiday | Hole in the protective coating of a steel pipeline in the field | | | | Details |
| Holl | Hollandberg | | | | Details |
| Home | Cr Home Creek | | | | Details |
| HON | Hazardous Organic NESHAP | | | | Details |
| Hoop | Hold Open (position in IRDV tester valve) | | | | Details |
| HOP | Hang Off Point/Profile (ie liner) | | | | Details |
| hop | hooper | | | | Details |
| HOR | Horizont | | | | Details |
| horiz | horizontal | | | | Details |
| horz | horizontal | | | | Details |
| HOT | hot oil tar | | | | Details |
| hot spot | Corrosive area located along the length of a pipeline; usually a wet bog, marsh, or bentonite area | | | | Details |
| Hov | Hoover | | | | Details |
| Hox | Hoxbar | | | | Details |
| HSFO | high sulfur fuel oil | | | | Details |
| HVGO | heavy gas oil | | | | Details |
| H-VOLT | high voltage | | | | Details |
| HWO | Hydraulic Work Over | | | | Details |
| HWO | hydraulic workover, usually working under pressure Some HWO units are set up with pipe handling capacity as are snubbing units | | | | Details |
| HYDRO | hydro test | | | | Details |
| HYDRO | Norsk Hydro Norway | | | | Details |
| HYDRO-Congo | National Oil Exploration and Exploitation Corp. Congo | | | | Details |
| HYPO | hypotenuse | | | | Details |
| HYROP | Hydrophone Log | | | | Details |
| i.O. | in Ordnung | | | | Details |
| I/O | input/output | | | | Details |
| IACO | International Civil Aviation Organization | | | | Details |
| IAEO | Iranian Atomic Energy Organization | | | | Details |
| IAOGP | International Association of Oil and Gas Producers | | | | Details |
| IAOM | Integrated Asset Operations Module | | | | Details |
| IAxOA | inner annulus to outer annulus | | | | Details |
| IBO | Internal Blowout | | | | Details |
| IBOP | Internal Blow Out Preventor | | | | Details |
| ICAO | International Civil Aviation Organization | | | | Details |
| icfos | microfossil(iferous) | | | | Details |
| ICoTA | Intervention and Coiled Tubing Association | | | | Details |
| ICOTA | International Coiled Tubing Operators Association | | | | Details |
| ICP-OES | inductive coupled plasma optical emission spectroscopy | | | | Details |
| Idio | Idiomorpha | | | | Details |
| IDRO | Industrial Development and Renovation Organization | | | | Details |
| IEOC | International Egyptian Oil Company | | | | Details |
| IEOC | International Egyptian Oil Co., Inc. Egypt | | | | Details |
| IFO | In Field Opportunity | | | | Details |
| IFO | Injection Fall-Off test | | | | Details |
| IFO | Intermediate Fuel Oil | | | | Details |
| IFO | Incident Free Operation (days) | | | | Details |
| iGOC | Initail Gas Oil Contact | | | | Details |
| IGOR | injection gas-oil ratio | | | | Details |
| ILO | International Labour Organization | | | | Details |
| ILOGS | Image Logs | | | | Details |
| IMHO | In my humble opinion | | | | Details |
| IMO | International Maritime Organization | | | | Details |
| IMO | In my opinion | | | | Details |
| IMO | International Maritime Organization(—) | | | | Details |
| info | information | | | | Details |
| INH2O | Inch of Water | | | | Details |
| INOC | Iraq National Oil Company | | | | Details |
| Inoc | Inoceramus | | | | Details |
| INOC | Iraq National Oil Company Iraq | | | | Details |
| insole | insoluble | | | | Details |
| INTCON | interconnection | | | | Details |
| INTERTANKO | Intl. Assn. of Independent Tanker Owners (—) | | | | Details |
| Investcorp | Arabian Investment Banking Corporation | | | | Details |
| iO | in Ordnung | | | | Details |
| IO | BRITISH INDIAN OCEAN TERRITORY | | | | Details |
| IO | initial open | | | | Details |
| IOC | International Oil Company | | | | Details |
| IOC | Indian Oil Corporation, Ltd. | | | | Details |
| IOC | Indian Oil Corporation | | | | Details |
| IOC | Indian Oil Company India | | | | Details |
| IOCA | Independent Oil Compounders Association | | | | Details |
| IOCC | Interstate Oil Compact Commission (became IOGCC in 1991) | | | | Details |
| IOCC | Interstate Oil Compact Commission | | | | Details |
| IOEC | Iranian Offshore Engineering Construction Company | | | | Details |
| IOEM | Invert Oil Emulsion Mud | | | | Details |
| IOGA | Illinois Oil & Gas Association | | | | Details |
| IOGANY | Independent Oil & Gas Association of New York | | | | Details |
| IOGAP | Independent Oil & Gas Association of Pennsylvania | | | | Details |
| IOGAWY | Independent Oil & Gas Association of West Virginia | | | | Details |
| IOGCC | Interstate Oil and Gas Compact Commission | | | | Details |
| IOGCC | Interstate Oil & Gas Compact Commission | | | | Details |
| IOGPT | Institute of Oil and Gas Petroleum Technology | | | | Details |
| IOIP | Initial Oil In Place | | | | Details |
| IOL | International Octane Ltd. | | | | Details |
| I-O-M | installation operation & maintenance | | | | Details |
| IOOA | Irish Offshore Operators’ Assn. Ireland | | | | Details |
| IOOC | Iranian Offshore Oil Company | | | | Details |
| IOP | Integrated Operations Planning | | | | Details |
| IOP | Iranian Oil Participants Limited | | | | Details |
| IOPA | Independent Oil Producers Agency | | | | Details |
| IOPC | Intl. Oil Pollution Compensation (—) | | | | Details |
| IOPPC | International Oil Pollution Prevention Certificate | | | | Details |
| IOR | Improved Oil Recovery | | | | Details |
| IOSA | International Oil Scouts Association | | | | Details |
| IOT | BRITISH INDIAN OCEAN TERRITORY | | | | Details |
| IPO | Internal Pressure Operated | | | | Details |
| IPO | Initial Public Offering | | | | Details |
| IPOD | Initial Plan of Development | | | | Details |
| IPRTOC | Improved Petroleum Recovery TransOil Corporation | | | | Details |
| IRO | Assn. of Dutch Suppliers in the Oil & Gas Industry Netherlands | | | | Details |
| ISO | international Standards Organization | | | | Details |
| ISO | International Organization for Standardization | | | | Details |
| ISO | International Standardisation Organisation | | | | Details |
| ISO | International Organization for Standardization, a network of national standards institutes of 146 countries, based in Geneva, Switzerland | | | | Details |
| ISO | independent system operators | | | | Details |
| Iso | C5,C6 isopentane (aka 2-methylbutane), isohexane (aka 2-methylpentane) | | | | Details |
| ISO | isometric | | | | Details |
| ISO | International Organization for Standardization (—) | | | | Details |
| ISO/CKR | isocracker | | | | Details |
| ISOL | Isotron | | | | Details |
| ISOL | isolate(tor) | | | | Details |
| isom | isometric | | | | Details |
| ISONIC | LWD Sonic | | | | Details |
| isoth | isothermal | | | | Details |
| iWOC | Initial Water Oil Contact | | | | Details |
| IWOCS | Installation / Workover Control System | | | | Details |
| J/O | joint operation | | | | Details |
| JDECO | Jerusalem District Electricity Corporation | | | | Details |
| JINO | joint interest nonoperated(property) | | | | Details |
| JNOC | Japan National Oil Corporation | | | | Details |
| JNOC | Japan National Oil Corporation Japan | | | | Details |
| JO | JORDAN | | | | Details |
| JOA | Joint Operating Agreement | | | | Details |
| JODCO | Japan Oil Development Company | | | | Details |
| JODI | Joint oil data initiative | | | | Details |
| JODICO | Jordan Dead Sea Industries Company | | | | Details |
| JOF | Joints Of Fluid | | | | Details |
| JOP | joint operating provisions | | | | Details |
| JOR | JORDAN | | | | Details |
| Jordinvest | Jordan Investment Trust | | | | Details |
| JVO | Joint Venture Operations | | | | Details |
| KAFCO | Kuwait Aviation Fuelling Company | | | | Details |
| KAFCO | Kuwait Aviation Fueling Co. KSC Kuwait | | | | Details |
| kao | kaolin | | | | Details |
| KAZGOSNEDRA | Kazakhstan | | | | Details |
| KCOOH | potassium formate | | | | Details |
| Keo | Effective permeability to oil | | | | Details |
| Keo-Bur | Keokuk-Burlington | | | | Details |
| KEPCO | Khazar Exploration and Production Company | | | | Details |
| kero | kerosine(kerosene) | | | | Details |
| Kilo | kilogram, 1000 grams | | | | Details |
| KIO | Kuwait Investment Office | | | | Details |
| KIOGA | Kansas Independent Oil and Gas Association | | | | Details |
| KIPCO | Kuwait Investments Projects Company | | | | Details |
| KMOC | Khanty Mansiysk Oil Corp.Siberia, Russia | | | | Details |
| KNOC | Korean National Oil Corporation Korea | | | | Details |
| Ko | permiability to oil | | | | Details |
| Ko | Kompressor | | | | Details |
| Ko | Oil Permeability | | | | Details |
| KO | kicked off | | | | Details |
| KO | kick off | | | | Details |
| KO | knock out | | | | Details |
| KOC | Kuwait Oil Company | | | | Details |
| KOC | Kuwait Oil Company KSC Kuwait | | | | Details |
| KOGA | Kentucky Oil & Gas Association | | | | Details |
| KOGAS | Korea Gas Corporation | | | | Details |
| KOGAS | Korean Gas Corp. Korea | | | | Details |
| KOIV | Knock Out Isolation Valve | | | | Details |
| KOLNG | Korea LNG Company | | | | Details |
| KOM | Kick-Off Meeting | | | | Details |
| Koot | Kootenai | | | | Details |
| KOP | Kick-Off Point (directional drilling) | | | | Details |
| KOP | Kick Off Plug | | | | Details |
| KOP | Kick off Point | | | | Details |
| KOP | kick-off point | | | | Details |
| KOP | kickoff point | | | | Details |
| KOR | KOREA, SOUTH | | | | Details |
| KOT | kick over tool | | | | Details |
| KOTC | Kuwait Oil Tanker Company | | | | Details |
| KOTC | Kuwait Oil Tanker Co. Kuwait | | | | Details |
| Kro | oil relative permiability | | | | Details |
| Kro | Triphasic Relative Permeability to Oil | | | | Details |
| Kro | relative permeability to oil | | | | Details |
| Krog | Relative Permeability to Oil in presence of Gas | | | | Details |
| Krow | Relative Permeability to Oil in presence of Water | | | | Details |
| KVO | Koninklijke Van Ommeren NV Netherlands | | | | Details |
| LAO | LAOS | | | | Details |
| LAOT | Linear Activation Override Tool | | | | Details |
| Lapco | Lavan Petroleum Company | | | | Details |
| LASMO | LASMO plc (London & Scottish Marine Oil Co.) UK | | | | Details |
| lb/ton | coke burn-off | | | | Details |
| LBOS | light brown oil stain | | | | Details |
| LCGO | light coker gas oil | | | | Details |
| LCOE | levelized cost of electricity | | | | Details |
| LFO | light fuel oil | | | | Details |
| LINCO | Liner and Completion Progress Report | | | | Details |
| LIOG | Lithography Log | | | | Details |
| LIOGA | Louisiana Independent Oil & Gas Association | | | | Details |
| litho | lithologic | | | | Details |
| litho | lithographic | | | | Details |
| LKO | Lowest Known Oil | | | | Details |
| lnfo | information | | | | Details |
| LO | SLOVAKIA (SLOVAK REPUBLIC) | | | | Details |
| LO | Load Oil | | | | Details |
| LO | lube oil | | | | Details |
| Lo Ho | Lower Hold | | | | Details |
| LOA | Letter Of Approval, Letter Of Acceptance | | | | Details |
| LOA | Letter Of Application | | | | Details |
| LOA | Letter Of Award | | | | Details |
| LOA | Lenght Over All | | | | Details |
| LOA | Letter of Authorisation/Agreement/Authority | | | | Details |
| LOA | Letter of Acceptance | | | | Details |
| LOA | length overall | | | | Details |
| LOC | Limiting oxygen concentration (see comment) | | | | Details |
| loc | location | | | | Details |
| loc | located, location | | | | Details |
| loc | abnd location abandoned | | | | Details |
| loc | gr location graded | | | | Details |
| Lock | a mechanism to hold a plug in a profile | | | | Details |
| LOE | Lease Operating Expenses | | | | Details |
| Loess | deposits of windborne dust | | | | Details |
| LOF | Lloyd’s Open Form | | | | Details |
| LOF | List Of Field | | | | Details |
| LOG | Logging Run | | | | Details |
| Log | a systematic recording of data from a well | | | | Details |
| log | logarithm(common) | | | | Details |
| LOGGN | Logging Whilst Drilling | | | | Details |
| LOGRS | Log Restoration Report | | | | Details |
| LOGSM | Log Sample | | | | Details |
| LOI | Letter Of Intend | | | | Details |
| LOI | Letter Of Indemnity. | | | | Details |
| LOK | Liner Oberkante | | | | Details |
| LOL | Laugh out loud | | | | Details |
| LOLER | Lifting Operations and Lifting Equipment Regulations | | | | Details |
| LOLO | Lift On Lift Off ship | | | | Details |
| long | longitude | | | | Details |
| long | longitude(inal) | | | | Details |
| LOOP | Lock Open | | | | Details |
| LOP | Lock Open Position | | | | Details |
| LOPA | Layer of Protection Analysis | | | | Details |
| LOR | Letter Of Recommendation | | | | Details |
| LOR | Land Owner Royalty | | | | Details |
| LOR | Lindsey Oil Refinery Ltd. UK | | | | Details |
| LOS | lease operations | | | | Details |
| Losal | low salt or fresher water | | | | Details |
| LOT | Leak off test | | | | Details |
| LOT | Linear Override Tool | | | | Details |
| LOT | Lock Open Tool | | | | Details |
| LOT | Leak-Off Test | | | | Details |
| LOTO | Lock Out / Tag Out | | | | Details |
| Lov | Lovell | | | | Details |
| Lov | Lovington | | | | Details |
| LOW | Last Open Water | | | | Details |
| low | lower | | | | Details |
| LOX | liquid oxygen | | | | Details |
| LPO | local purchase order | | | | Details |
| LSFO | low sulfur fuel oil | | | | Details |
| LSO | LESOTHO | | | | Details |
| LSOBM | low solids oil base mud | | | | Details |
| LSSON | Long Spacing Sonic Log | | | | Details |
| LT (LTONS) | Long TONS. | | | | Details |
| LtO | License to Operate | | | | Details |
| LTO | Light Tight Oil | | | | Details |
| LTOBM | low toxicity oil based mud | | | | Details |
| LT-OBM | Low Toxicity - Oil Based Mud | | | | Details |
| L-VOLT | low voltage | | | | Details |
| LVOT | Linear Valve Override Tool | | | | Details |
| LVPO | Low Value Purchase Order | | | | Details |
| LWOP | Logging Well on Paper | | | | Details |
| M or m | prefix designating a number in thousands (not to be confused with SI prefix M for mega- or m for milli) | | | | Details |
| M/O | Mill Obstruction | | | | Details |
| Major | typically a large operator, usually a multinational oil company that is usually a large producer in several areas of the world | | | | Details |
| MAOP | Maximum Allowable Operating Pressure | | | | Details |
| Marg. coco. | Marginulina coco | | | | Details |
| MARICONSULT | Technical support to Transmed Algeria | | | | Details |
| MARPOL | Marine Pollution | | | | Details |
| MAXIMO | Computer Based Materials Management System (IBM) | | | | Details |
| MBO | management by objective | | | | Details |
| MBO | Thousand barrels of crude oil | | | | Details |
| Mbo/d | thousand barrels oil per day | | | | Details |
| Mbod | thousand barrels of oil per day | | | | Details |
| mboe | million barrels oil equiv | | | | Details |
| MBOE | Thousand barrels of oil equivalent | | | | Details |
| Mboed | thousand barrels of oil equivalent per day | | | | Details |
| MBRO | Multi-Bore Restriction Orifices | | | | Details |
| MCO | MONACO | | | | Details |
| MCO | mud cut oil | | | | Details |
| MCO | mud-cut oil | | | | Details |
| MDDO | maximum daily delivery obligation | | | | Details |
| MDO (DO) | Marine Diesel Oil | | | | Details |
| MEDCO | Mediterranean Oil Shipping & Transport Co. SAL Lebanon | | | | Details |
| MEGO | My Eyes Glaze Over (useful for courses) | | | | Details |
| MEKOG | Maatschappij Tot Exploitatie van Kooksovengassen NV Netherlands | | | | Details |
| memo | memorandum | | | | Details |
| MeOH | Methanol | | | | Details |
| MeOH | methyl alcohol | | | | Details |
| MEOR | Microbial EOR | | | | Details |
| MEOR | microbial enhanced oil recovery | | | | Details |
| MEOS | Middle East Oil Show | | | | Details |
| MEOW | Middle East Oil Week | | | | Details |
| Meso | Mesozoic | | | | Details |
| methol | methanol | | | | Details |
| MFO | Multi-Flow Optimization | | | | Details |
| mho/m | mhos per meter | | | | Details |
| MICLOG | Microlog | | | | Details |
| microsec | microsecond | | | | Details |
| micro-xin | microcrystalline | | | | Details |
| Midor | Middle East Oil Refinery | | | | Details |
| MIGOP | Misr Gulf Oil Processing Company Egypt | | | | Details |
| Mio | Miocene | | | | Details |
| MIOP | Mandatory Oil Import Program | | | | Details |
| MIRO | Mineraloelraffinerie Oberrhein GmbH & Co. Germany | | | | Details |
| MM or mm | prefix designating a number in millions (or SI unit millimetre) | | | | Details |
| MMBO | Million Barrels of crude Oil | | | | Details |
| MMbod | million barrels of oil per day | | | | Details |
| MMboe | million barrels of oil equivalent | | | | Details |
| MMboed | million barrels of oil equivalent per day | | | | Details |
| MMO | mixed metal oxides | | | | Details |
| MMormm | prefix designating a number in millions (not to be confused with SI unit mm for millimetre) | | | | Details |
| MO | Managing Owner | | | | Details |
| MO | MOROCCO | | | | Details |
| MO | MACAU | | | | Details |
| MO | Missouri | | | | Details |
| MO | molybdenum | | | | Details |
| MO | motor oil | | | | Details |
| MO | moving out | | | | Details |
| MOA | Memorandom of Agreement | | | | Details |
| mob | mobile | | | | Details |
| MobiNil | Mobile Nile | | | | Details |
| MOC | Management Of Change | | | | Details |
| MOC | Maintenance of Certification | | | | Details |
| MOC | Minimum oxygen concentration (see LOC) | | | | Details |
| MOC | management of change – a process to understand all the implications of a change to a procedure | | | | Details |
| MOC | ACOR Distrubuidora de Cumbustiveis S.A. Mozambique | | | | Details |
| MOCL | Mobil Oil Co. Ltd.UK | | | | Details |
| MOCT | moving (ed) off cable tools. Completion tools, completion unit | | | | Details |
| MOCT | moving out(off ) cable tools | | | | Details |
| MOCU | moving out completion unit | | | | Details |
| MOD | Money Of Day (economics, actually cost at time in future, not discounted to today) | | | | Details |
| MOD | Money of the Day | | | | Details |
| MOD | Ministry of Defence | | | | Details |
| mod | moderate | | | | Details |
| mod | model | | | | Details |
| mod | moderate(ly) | | | | Details |
| mod | modification | | | | Details |
| MODA | Manual of Delegated Authority | | | | Details |
| MODEC | Mitsui Ocean Development & Engineering Co., Ltd. Japan | | | | Details |
| MODU | Mobile Offshore Drilling Unit | | | | Details |
| MODU | Mobile Offshore Drilling Units | | | | Details |
| modu | modular | | | | Details |
| MOE | millout extension | | | | Details |
| MOE | milled other end | | | | Details |
| MOE | moving out equipment | | | | Details |
| Moen | Moenkopi | | | | Details |
| MOEV | Mechanically Operated Equalizing Valve (northstar tool) | | | | Details |
| MOF | Marine Offloading Facility | | | | Details |
| MOGA | Michigan Oil & Gas Association | | | | Details |
| MOI | Memorandum of Interest | | | | Details |
| MOL | Mogyar Olaj-es Gazipari RT | | | | Details |
| MOL | Main Oil Line | | | | Details |
| mol | molasse | | | | Details |
| mol | mole | | | | Details |
| MOL | molecule, molecular | | | | Details |
| mol | mollusca | | | | Details |
| mol | wt molecular weight | | | | Details |
| MOL | Magyar Olaj es Gasipari Reszvenytarsasag (Hungarian Oil & Gas Co. Ltd.) Hungary | | | | Details |
| MOLCHOP | More Or Less CHarterers OPtion | | | | Details |
| MOLOO | More Or Less Owners (Masters) Option | | | | Details |
| MoM | Minutes of Meeting | | | | Details |
| MOMR | Monthly Oil Market Report | | | | Details |
| MON | MONitors (fire) | | | | Details |
| MON | Miscellaneous Organic NESHAP | | | | Details |
| mon | monitor | | | | Details |
| MON | motor octane number | | | | Details |
| MONO | Mono Electric | | | | Details |
| Mont | Montoya | | | | Details |
| MOO | Multiple Objective Optimization | | | | Details |
| Moor | Mooringsport | | | | Details |
| MOP | Margin of Over Pull | | | | Details |
| MOP | Computed Movable | | | | Details |
| MOP | maximum operating pressure | | | | Details |
| MOP | Moveable Oil Pot | | | | Details |
| MoPNG | Ministry of Petroleum and Natural Gas | | | | Details |
| MOPO | Manual Of Permitted Operations | | | | Details |
| MOPU | Mobile Offshore Production Unit | | | | Details |
| MOR | Managed Open Resources | | | | Details |
| MOR | Monthly Oil Report | | | | Details |
| Mor | Morrow | | | | Details |
| MOR | moving out rig | | | | Details |
| Morr | Morrison | | | | Details |
| MORT | moving (ed) off rotary tools | | | | Details |
| MORT | moving out(off ) rotary tools | | | | Details |
| Mos | Mosby | | | | Details |
| MOT | Ministry Of Transpory | | | | Details |
| MOT | Monthly OverTime | | | | Details |
| MOT | Materials/Marine Offloading Terminal | | | | Details |
| mot | motor | | | | Details |
| mott | mottled | | | | Details |
| MOTV | Mechanically Operated Tester Valve (northstar tool) | | | | Details |
| MOU | Memorandum of Understanding | | | | Details |
| MOU | motor oil units | | | | Details |
| MOV | Movable Oil Volume | | | | Details |
| mov | moving | | | | Details |
| Mow | Mowry | | | | Details |
| MOZ | MOZAMBIQUE | | | | Details |
| MPGR-Soap | multipurpose grease soap base | | | | Details |
| MRO | Maintenance, repair, and operations | | | | Details |
| MRO | Memory Read Out | | | | Details |
| MRPO | MDT - Pump-Out Module | | | | Details |
| MTO | Material Take Off | | | | Details |
| MTO | material take-off | | | | Details |
| mtoe | million tonnes oil equivalent | | | | Details |
| MTONS | Metric Tonnes | | | | Details |
| MuSol | Mutual Solvent | | | | Details |
| MVOP | monthly volume operation plan | | | | Details |
| MWO | Minor Work Order | | | | Details |
| MXMWO | Maximum Mud Wieght oil based | | | | Details |
| n.o.s | Not Otherwise Specified | | | | Details |
| N/O | north offset | | | | Details |
| NaCO3 | sodium carbonate | | | | Details |
| NACOPS | National Advisory Committee on Petroleum Statistics (Canada) | | | | Details |
| NAESCO | National Association of Energy Services Companies | | | | Details |
| NAFTOGAZ | Centre de Developpement et d’Application des Techniques Petrolieres et Gaieres Algeria | | | | Details |
| NAMCOR | National Petroleum Corp. of Namibia Namibia | | | | Details |
| NAO | North Africa & Offshore | | | | Details |
| NAOC | North Aspheron Operating Company | | | | Details |
| NaOH | sodium hydroxide | | | | Details |
| NAOHSM | National Association of Oil Heating Service Managers | | | | Details |
| Napocor | National Power Corporation | | | | Details |
| NARO | National Association of Royalty Owners | | | | Details |
| NATO | North Atlantic Treaty Organization | | | | Details |
| NBO | New Business Opportunities | | | | Details |
| NBO | National Bank of Oman | | | | Details |
| NDBOPs | nipple(ed)(ing) down blowout preventers | | | | Details |
| NDOR | notifiable dangerous occurrence rate | | | | Details |
| NEBOSH | National Examination Board in Occupational Safety and Health (www.nebosh.com) | | | | Details |
| NEGO | negotiation | | | | Details |
| NEO | neoprene A ball covering and seal type | | | | Details |
| Nepco | National Electricity and Power Company | | | | Details |
| NEREFCO | Netherlands Refining Co. Netherlands | | | | Details |
| Nesco | Naftgaran Engineering Services Company | | | | Details |
| NetBIOS | Network Basic Input Output System | | | | Details |
| Neutron | Ray | | | | Details |
| NFOC | no fluorescence or cut | | | | Details |
| NGSCO | National Gas Shipping Company | | | | Details |
| NGSCO | National Shipping Co. Abu Dhabi | | | | Details |
| NIDOCO | Nile Delta Oil Company Egypt and others | | | | Details |
| NIO | Notice Inviting Offer | | | | Details |
| Niob | Niobrara | | | | Details |
| NIOC | National Iranian Oil Company | | | | Details |
| NIOC | National Iranian Oil Co. Iran | | | | Details |
| NIOEC | National Iranian Oil Engineering and Construction Company | | | | Details |
| NIOSH | National Institute for Occupational Safety and Health (see comment) | | | | Details |
| NIOSH | National Institute for Occupational Safety and Health | | | | Details |
| nitro | nitoglycerine | | | | Details |
| NMO | Normal Move Out | | | | Details |
| NMOCC | New Mexico Oil Conservation Commission | | | | Details |
| NMOGA | New Mexico Oil and Gas Association | | | | Details |
| NMVOC | Non-Methane Volatile Organic Compounds | | | | Details |
| NO | No Dull Characteristics | | | | Details |
| No | Oil Corey | | | | Details |
| NO | NORWAY | | | | Details |
| NO | North Dakota | | | | Details |
| NO | new oil | | | | Details |
| NO | Noble-Olson | | | | Details |
| NO | normally open | | | | Details |
| NO | number | | | | Details |
| No | Inc no increase | | | | Details |
| no | rec no recovery | | | | Details |
| No. | number | | | | Details |
| No. | number(before a number, i.e., No. 3) | | | | Details |
| NOA | Notice of Acquisition | | | | Details |
| NOAA | National Oceanic and Atmospheric Administration | | | | Details |
| NOB | not on bottom | | | | Details |
| NOC | National Oil Company | | | | Details |
| NOC | National Oil Corporation | | | | Details |
| NOC | Note of Completion of Work or No Objection Certificate | | | | Details |
| NOC | National Oil Companies | | | | Details |
| NOC | national (or state-owned) oil company | | | | Details |
| NOC | LIBYA National Oil Company (Libya) Libya | | | | Details |
| NOCK | National Oil Corporation of Kenya Ltd. Kenya | | | | Details |
| nod | nodules | | | | Details |
| nod | nodule, nodular | | | | Details |
| Nod. | blan. Nodosaria blanpiedi | | | | Details |
| Nod. | Mex. Nodosaria mexicana | | | | Details |
| NODCO | National Oil Distribution Company | | | | Details |
| NODCO | National Oil Distribution Co. Qatar | | | | Details |
| NODE | Well Performance Simulation (NODES) | | | | Details |
| NOEL | no-observed-effect level | | | | Details |
| NOFI | National Oil Fuel Institute | | | | Details |
| NOGEPA | Netherlands Oil & Gas Exploration & Production Assn. Netherlands | | | | Details |
| NOIA | National Ocean Industries Association | | | | Details |
| NOISL | Noise Log | | | | Details |
| NOJC | National Oil Jobbers Council | | | | Details |
| NOJV | nonoperated joint ventures | | | | Details |
| NOKUS | NOrsk Kontrollert Utenlandsk Selskap i lavskatteland (Norwegian controlled foreign company in lowtax country) | | | | Details |
| nom | nominal | | | | Details |
| NOMADS | National Oil-Equipment Manufacturers and Delegates Society | | | | Details |
| Non | Nonionella | | | | Details |
| nonf | G nonflammable compressed gas | | | | Details |
| NOP | nonoperating property | | | | Details |
| NOPAT | Net Operating Profit After Tax | | | | Details |
| NOR | Notice Of Readiness | | | | Details |
| NOR | NORWAY | | | | Details |
| NOR | no order required | | | | Details |
| nor | normal | | | | Details |
| NORM | Naturally Occurring Radioactive Material | | | | Details |
| NORM | Natural Occurring Radioactive Minerals | | | | Details |
| NORM | Natural Occurring Radioactive Material | | | | Details |
| NORM | a naturally occurring radioactive scale Usually Barium Sulfate scale with Uranium or Radium atoms substituted into the lattice structure Can be detected downhole with a gamma ray log | | | | Details |
| NORSOK | Norsk Sokkels Konkurranseposisjon | | | | Details |
| NOS | Net Oil Sand | | | | Details |
| nos | Not Otherwise Specified | | | | Details |
| NOS&G | no show oil and gas | | | | Details |
| NOV | Non Operated Venture | | | | Details |
| NOV | notice of violation | | | | Details |
| Nox | Nitrogen Oxides | | | | Details |
| NOX | oxides of nitrogen | | | | Details |
| noz | nozzle | | | | Details |
| Nozzle | a shaped orifice for directing fluid flow | | | | Details |
| NPOS | no paint on seams | | | | Details |
| NPTO | National Petroleum Technology Office | | | | Details |
| NRPOD | New Revised Plan of Development | | | | Details |
| NRWO | non rig workover | | | | Details |
| NSFOC | no show fluorescence or cut | | | | Details |
| NSO | No Surface Occupancy | | | | Details |
| NSO | no show oil | | | | Details |
| NTOGA | North Texas Oil & Gas Association | | | | Details |
| NUBOPs | nipple(ed)(ing) up blowout prevents | | | | Details |
| NWO | Nord-West Oelleitung GmbH Germany | | | | Details |
| Nylon | a polyamide material | | | | Details |
| NZOG | New Zealand Oil and Gas Ltd. New Zealand | | | | Details |
| O sd | oil sand | | | | Details |
| O&G | Oil and Gas (referring to the industry or the companies in it) | | | | Details |
| O&G | Oil and Gas | | | | Details |
| O&G | oil & gas | | | | Details |
| O&GC | SULW oil and gas-cut sulfur water | | | | Details |
| O&GCAW | oil & gas cut acid water | | | | Details |
| O&GCAW | oil and gas-cut acid water | | | | Details |
| O&GCLW | oil & gas cut load water | | | | Details |
| O&GCLW | oil and gas-cut load water | | | | Details |
| O&GCM | oil & gas cut mud | | | | Details |
| O&GCM | oil and gas-cut mud | | | | Details |
| O&GCSW | oil & gas cut salt water | | | | Details |
| O&GCSW | oil and gas-cut salt water | | | | Details |
| O&GCW | oil & gas cut water | | | | Details |
| O&GCW | oil and gas-cut water | | | | Details |
| O&GL | oil and gas lease | | | | Details |
| O&M | Operations and Maintenance | | | | Details |
| O&M | Operation & Maintenance | | | | Details |
| O&SW | oil & salt water | | | | Details |
| O&SW | oil and salt water | | | | Details |
| O&SWCM | oil and sulfur water-cut mud | | | | Details |
| O&W | oil & water | | | | Details |
| O&W | oil and water | | | | Details |
| o.a. | Over All | | | | Details |
| O.E. | Ohne Ergebnis | Without success | | | Details |
| O/P | Overpull | | | | Details |
| O/S | out of service over and short(report) | | | | Details |
| O/S | out of stock | | | | Details |
| O/T | tk open-top tank | | | | Details |
| O’H | O’Hara | | | | Details |
| O2 | Oxygen | | | | Details |
| O3 | ozone | | | | Details |
| OA | Over Aged | | | | Details |
| OA | overall | | | | Details |
| OAB | Oman Arab Bank | | | | Details |
| OAH | overall height | | | | Details |
| Oakv | Oakville | | | | Details |
| OAL | OverAll Length (normally for x-overs) | | | | Details |
| OAL | overall length | | | | Details |
| OAP | outer annulus pressure | | | | Details |
| OAPEC | Organization of Arab Petroleum Countries | | | | Details |
| OAPEC | Organization of Arab Petroleum Exporting Countries | | | | Details |
| OAPEC | Organization of Arab Petroleum Exporting Countries (—) | | | | Details |
| OAU | Organization of African Unity | | | | Details |
| OAW | oil abandoned well | | | | Details |
| OB | OverBalanced (refer to conventional over balanced drilling) | | | | Details |
| OB | Operator Board | | | | Details |
| OB | off bottom | | | | Details |
| OBC | Ocean Bottom Cable (Seismic) | | | | Details |
| OBC | Ocean Bottom Cable | | | | Details |
| OBC | Onboarding Course | | | | Details |
| OBCS | Ocean Bottom Cable System | | | | Details |
| OBDT | Oil Base Mud Dipmeter | | | | Details |
| OBDTL | OBDT Log | | | | Details |
| OBEVA | OBDT Evaluation Report | | | | Details |
| obj | object | | | | Details |
| OBM | Oil-Based Mud | | | | Details |
| OBM | Oil Based Mud | | | | Details |
| OBMI | Oil Base Micro Imager | | | | Details |
| OBMO | outboard motor oil | | | | Details |
| OBMT | Oil Base Mud Formation Imager | | | | Details |
| OBO | Oil Bulk Ore | | | | Details |
| OBP | Over Balanced Perforation | | | | Details |
| OBR | oil | | | | Details |
| OBS | ocean bottom seismic | | | | Details |
| OBS | observation | | | | Details |
| OBS | ocean bottom suspension | | | | Details |
| obsol | obsolete | | | | Details |
| OBUs | Offshore Banking Units | | | | Details |
| OBW & RS | optimum bit weight and rotary speed | | | | Details |
| OC | Off Center Wear | | | | Details |
| OC | operating center | | | | Details |
| OC | outer casing | | | | Details |
| oc | Operating Committee | | | | Details |
| oc | oil cut | | | | Details |
| OC | on center | | | | Details |
| OC | open choke | | | | Details |
| OC | open cup | | | | Details |
| OC | operations commenced | | | | Details |
| OC | Other Curves | | | | Details |
| OC- | Oil and Gas Investigations Chart | | | | Details |
| OCAW | Oil, Chemical & Atomic Workers International Union | | | | Details |
| OCB | oil circuit breaker | | | | Details |
| OCC | Operations Coordination Center | | | | Details |
| OCC | occasional. occasionally | | | | Details |
| occ | occasional(ly) | | | | Details |
| OCENSA | Oleoducto Central S.A. Colombia | | | | Details |
| OCI | Oil Corrosion Inhibitor (Vessels) | | | | Details |
| OCIMF | Oil Companies International Marine Forum | | | | Details |
| OCIMF | Oil Companies International Marine Forum (—) | | | | Details |
| OCK | Ordinary Cokriging | | | | Details |
| OCL | Quality Control Log | | | | Details |
| OCM | Operating Committee Meeting | | | | Details |
| OCM | oil cut mud | | | | Details |
| OCM | oil-cut mud | | | | Details |
| OCR | Optical Character Recognition (In scaning & printing - changing the scan to text ) | | | | Details |
| OCR | Office of Coal Research | | | | Details |
| OCS | Overall Contracting Strategy | | | | Details |
| OCS | outer continental shelf | | | | Details |
| OCSLA | Outer Continental Shelf Lands Act | | | | Details |
| OCSW | oil cut salt water | | | | Details |
| OCSW | oil-cut salt water | | | | Details |
| oct | octagon, octagonal | | | | Details |
| oct | octane | | | | Details |
| OCTG | Oil Country Tubular Goods - pipe made to API specifications | | | | Details |
| OCTG | Oil Country Tubular Goods (oil well casing, tubing, and drill pipe) | | | | Details |
| OCTG | oil country tubular goods | | | | Details |
| ocw | oil cut water | | | | Details |
| OCW | oil-cut water | | | | Details |
| OD | Outside Diameter | | | | Details |
| OD | Outer Diameter (of a tubular component such as casing) | | | | Details |
| od | odor | | | | Details |
| OD/ID | outside diameter/inside diameter, usually used in reference to pipe dimension, and a factor in pressure stability of the pipe | | | | Details |
| ODAC | Oil Depletion Analysis Centre | | | | Details |
| ODB | Oman Development Bank | | | | Details |
| ODD | Oil Downhole Density | | | | Details |
| ODE | Ordinary Differential Equations | | | | Details |
| Odel | O’Dell | | | | Details |
| ODFE | Old Drill Floor Elevation | | | | Details |
| ODME | Oil Discharge Monitoring Equipment (transferring by ship) | | | | Details |
| ODP | Ocean Drilling Program | | | | Details |
| ODR | Operating day rate | | | | Details |
| ODS | Ozone Depleting Substance | | | | Details |
| ODT | Oil Down To | | | | Details |
| ODT | Oil Down To (in reservoir) | | | | Details |
| ODT | OmniDirectional Tool | | | | Details |
| OE | Open End | | | | Details |
| OE | Ohne Ergebnis | Without success | | | Details |
| OE | oil emulsion | | | | Details |
| OE | overexpenditure | | | | Details |
| OEA | Operaciones Especiales Argentinas Argentina | | | | Details |
| OEB | other end beveled | | | | Details |
| OEBPS | Open EBook Publication Structure | | | | Details |
| OECD | Organization for Economic Cooperation and Development | | | | Details |
| OECD | Organization of Economic Cooperation and Development | | | | Details |
| OECD | Organization for Economic Cooperation & Development | | | | Details |
| OEL | Occupational Exposure Limit | | | | Details |
| OEM | Original Equipment Manufacturer | | | | Details |
| OEM | oil emulsion mud | | | | Details |
| OeN | Public Communications Networks Group | | | | Details |
| OEP | Office of Emergency Preparedness | | | | Details |
| OEP | Organization for Energy Planning Egypt | | | | Details |
| OERB | Oklahoma Energy Resources Board | | | | Details |
| OES | Occupational Exposure Standard | | | | Details |
| OF | (RD) Oil Fields (Regulation & Development) | | | | Details |
| OF | open flow | | | | Details |
| OF | open-file report | | | | Details |
| OFA | Optical Fluid Analyser | | | | Details |
| OFA | Oxygenated Fuels Association | | | | Details |
| OFAC | Office of Foreign Asset Control | | | | Details |
| OFC | Open-Flow Capacity | | | | Details |
| off | office, official | | | | Details |
| off-sh | offshore | | | | Details |
| OFIC | oil insulated fan-cooled | | | | Details |
| OFL | overflush(ed) | | | | Details |
| OFLU | oil fluorescence | | | | Details |
| OFOE | orfice flange one end | | | | Details |
| OFP | open flow potential | | | | Details |
| OFR | Oil Flow Rate | | | | Details |
| OFS | Oil Field Services | | | | Details |
| OFS | offsite | | | | Details |
| OFST | Offset Vertical Seismic Profile | | | | Details |
| OFT | Office of Fair Trading | | | | Details |
| OFW | Opportunity Framing Workshop | | | | Details |
| OG | Oil & Gas | | | | Details |
| OGAA | Oil and Gas Activities Act (law in British Colombia) | | | | Details |
| OGC | Oil & Gas & Condensate | | | | Details |
| OGD | Onshore Gas Development | | | | Details |
| OGDC | Oil and Gas Development Corp. Pakistan | | | | Details |
| OGDCL | Oil & Gas Development Company Limited | | | | Details |
| OGIC | Oil and Gas India Conference and Exhibition | | | | Details |
| OGIFF | Oil and gas integrated field file | | | | Details |
| OGIP | original gas in place | | | | Details |
| OGJ | The Oil & Gas Journal | | | | Details |
| OGJ | Oil & Gas Journal | | | | Details |
| OGLV | operating gas lift valve | | | | Details |
| OGMC | Oil and Gas Mine Company | | | | Details |
| OGOC | Original Gas Oil Contact | | | | Details |
| OGON | Onroerend Goed Oranje-Nassau NV Netherlands | | | | Details |
| OGP | The International Association of Oil and Gas Producers | | | | Details |
| OGP | International Association of Oil and Gas Producers | | | | Details |
| OGP | International Assn. Of Oil & Gas Producers UK | | | | Details |
| OGS | Oil & Gas Show | | | | Details |
| OGSA | Oil and Gas Services Australia | | | | Details |
| OGSA | OMV Gas Storage Austria GmbH | | | | Details |
| OGU | Oil & Gas & Unknown | | | | Details |
| OGW | Oil & Gas & Water | | | | Details |
| OGWC | Original Gas Water Contact | | | | Details |
| OH | Openhole Log | | | | Details |
| OH | Occupational Health | | | | Details |
| OH | open hole | | | | Details |
| OH | Ohio | | | | Details |
| OH | open hearth | | | | Details |
| OH | overhead | | | | Details |
| OH&S | Occupational Health and Safety | | | | Details |
| OHC | Open Hole Completion | | | | Details |
| OHFP | open hole frac pack Frac packing in an open hole | | | | Details |
| OHGP | Open Hole Gravel Pack | | | | Details |
| OHGP | Open-hole Gravelpack | | | | Details |
| OHGPW | Open-hole Gravelpack Wechsel | | | | Details |
| Ohm | electrical unit of resistance One ohm is the the resistance through which a potential of one volt will maintain a current of one ampere | | | | Details |
| ohm | ohm | | | | Details |
| ohm-cm | ohm-centimeter | | | | Details |
| ohm-m | ohmmeter | | | | Details |
| OHRA | Occupational Health Risk Assessment | | | | Details |
| OHRM | Occupational Heath Risk Management | | | | Details |
| OHS | Occupational Health and Safety | | | | Details |
| OHSAS | Occupational Health and Safety Assessment Series | | | | Details |
| OI | Operational Integrity | | | | Details |
| OI | Oxygen Index | | | | Details |
| OI | oil insulated | | | | Details |
| OIA | Oil Import Administration | | | | Details |
| OIAB | Oil Import Appeals Board | | | | Details |
| OIB | Oman International Bank | | | | Details |
| OIC | Organization of Islamic Conference | | | | Details |
| OIC | Oil Information Committee | | | | Details |
| OIEC | Oil Industries Engineering Company | | | | Details |
| OIES | Oxford Institute for Energy Studies | | | | Details |
| OIFC | oil insulated, fan cooled | | | | Details |
| OIH | Oil in Hole | | | | Details |
| OIIP | oil initially in place | | | | Details |
| Oil | Oil India Umited | | | | Details |
| Oil | Cr Oil Creek | | | | Details |
| oilfract | Oil fractured | | | | Details |
| OILINVEST | Intl. Arm of NOC Libya Libya | | | | Details |
| OILREC | OIL RECovery | | | | Details |
| OIM | Offshore Installation Manager | | | | Details |
| OIM | operations installation manager | | | | Details |
| OIP | Oil Initially in Place | | | | Details |
| OIP | oil in place | | | | Details |
| OIPA | Oklahoma Independent Petroleum Association | | | | Details |
| OISC | oil insulated, self-cooled | | | | Details |
| OISD | OIL INDUSTRY SAFETY DIRECTORATE | | | | Details |
| OIT | oil in tanks | | | | Details |
| OIW | oil in water | | | | Details |
| OIWC | oil immersed, water cooled | | | | Details |
| OJ | oil jar | | | | Details |
| OJT | On Job Training | | | | Details |
| OJT | On the Job Training | | | | Details |
| OK | Oberkante | | | | Details |
| OK | Ordinary Kriging | | | | Details |
| OK | Oklahoma | | | | Details |
| OKGT | Hungarian National Oil & Gas Trust Hungary | | | | Details |
| OKIOC | Offshore Kazakstan International Operating Company | | | | Details |
| OKIOC | Offshore Kazakhstan Intl. Operating Co. Kuwait | | | | Details |
| OL | off / on location | | | | Details |
| OL | open line(no choke) | | | | Details |
| OL | Log Overlays | | | | Details |
| OLADE | Organization Latinoamericana de Energia Ecuador | | | | Details |
| OLE | Object Linking and Embedding | | | | Details |
| ole | olefin | | | | Details |
| OLECASA | Oleoductos Canarios S.A. Spain | | | | Details |
| OLF | Norwegian Oil Industry Assn. Norway | | | | Details |
| Olig | Oligocene | | | | Details |
| OLN | outline | | | | Details |
| olv | olive | | | | Details |
| OM | Operations Manager | | | | Details |
| OM | Gulf of Mexico | | | | Details |
| OM | OMAN | | | | Details |
| OM1 | Short Line SH 50711 | | | | Details |
| OM2 | Short Line SH 50712 | | | | Details |
| OM3 | Short Line SH 50970 | | | | Details |
| OMAF | Onshore Abu Dhabi Multiple Attenuation Task Force | | | | Details |
| OMB | Office of Management and Budget | | | | Details |
| OMDP | Ocean Margin Drilling Program (or drilling project) | | | | Details |
| OMIFCO | Oman-India Ferilizer Company | | | | Details |
| OML | Oil Mining License (Nigeria) | | | | Details |
| OMN | OMAN | | | | Details |
| OMNIS | Office des Mines Nationales et des Indusries Strategiques (formerly Office Militaire National Pour Les Industries Strategiques) Madagascar | | | | Details |
| OMPD | Opportunity Maturation and Project Delivery | | | | Details |
| OMPD | Offender Management & Professional Development | | | | Details |
| OMRL | Oriented Micro | | | | Details |
| OMRL | OMRL Log | | | | Details |
| OMRL | Oriented Micro-Resistivity Log | | | | Details |
| OMRL | oriented microresistivity | | | | Details |
| OMV | Oesterreichische Mineraloelverwaltung | | | | Details |
| OMV | Oesterreichische Mineraloelverwaltung A.G. Austria | | | | Details |
| ONACO | Orenburg Oil Company Russia | | | | Details |
| ONAN | Oil Natural Air Natural cooled transformer | | | | Details |
| Onarep | Office National de Recherche et d’Exploitation Petrolière | | | | Details |
| ONAREP | Office National des Recherches et d’Exploitations Petrolieres (Moroccan National Oil Co.) Morocco | | | | Details |
| ONAS | National Wastewater Authority | | | | Details |
| ONCF | Office National des Chemins de Fer | | | | Details |
| ONE | Office National d’Electricité | | | | Details |
| ONE | Oranje-Nassau Energie Netherlands | | | | Details |
| ONEPM | Oranje-Nassau Energy Participate Netherlands | | | | Details |
| ONGC | Oil and Natural Gas Corporation | | | | Details |
| ONGC | Oil & Natural Gas Corporation | | | | Details |
| ONGC | Oil and Natural Gas Commission India | | | | Details |
| ONHC | Oman National Holding Company | | | | Details |
| ONPT | Office National des Postes et des Télécommunications | | | | Details |
| ONR | octane number requirement | | | | Details |
| ONRI | octane number requirement increase | | | | Details |
| ONW | ONWards | | | | Details |
| OO | Owners Option | | | | Details |
| OO | oil odor | | | | Details |
| OOC | Oman Oil Company | | | | Details |
| ooc | ooliclastic | | | | Details |
| OOC | Offshore Operators Committee | | | | Details |
| OODBMS | Object Oriented DBMS | | | | Details |
| OOE | Offshore Operation Engineer (senior technical authority on an offshore oil platform) | | | | Details |
| OOGA | Ohio Oil & Gas Association | | | | Details |
| OOIP | Original Oil In Place | | | | Details |
| OOIP | oil originally in place (or original oil in place) | | | | Details |
| ool | oolitic | | | | Details |
| oom | oolimoldic | | | | Details |
| OOP | Other Operations | | | | Details |
| OOP | Object Oriented Programming | | | | Details |
| OOS | out of service | | | | Details |
| OOT | Out of Tolerance | | | | Details |
| OOWC | Original Oil Water Contact | | | | Details |
| OOWLL | Order On WireLine Logging | | | | Details |
| OP | Overpull | | | | Details |
| OP | OPerator | | | | Details |
| OP | open | | | | Details |
| OP | articles published in outside journals/books | | | | Details |
| OP | oil pay | | | | Details |
| OP | outpost | | | | Details |
| OP | overproduced | | | | Details |
| op | hole open hole | | | | Details |
| OPA | oil pollution act | | | | Details |
| OPA 90 | The US Oil Pollution Act of 1990 | | | | Details |
| OPAB | Oljeprospektering AB Sweden | | | | Details |
| OPB | old plug back | | | | Details |
| OPB | old plugback | | | | Details |
| OPBD | old plugback depth | | | | Details |
| OPC | Oriental Petrochemical Company | | | | Details |
| OPC | Oil Policy Committee | | | | Details |
| OPC | Oriental Petrochemicals Company Egypt | | | | Details |
| OPCO | Lukoil Mid-East Operational Company | | | | Details |
| OPCO | Operating Company | | | | Details |
| OPCOM | Romanian gas and electricity market operator | | | | Details |
| OPEC | Organization of Petroleum Exporting Countries | | | | Details |
| OPEC | Organization of the Petroleum Exporting Countries | | | | Details |
| OPEC | Organization of Petroleum Exporting Countries (1983 list | | | | Details |
| OPEC | Organization of Petroleum Exporting Countries (—) | | | | Details |
| OPECNA | OPEC News Agency OPEC | | | | Details |
| oper | operate, operations, operator | | | | Details |
| Operc | Operculinoides | | | | Details |
| OPEX | Operating Expenditure | | | | Details |
| OPEX | operation expenditures Generally repair or maintenance expenses | | | | Details |
| OPEX | Operatin& Expenditure | | | | Details |
| OPF | Oil Protection Force (the polic and Army in Kurdistan gaurding the well sites) | | | | Details |
| OPH | Opening Hole | | | | Details |
| OPI | oil payment interest | | | | Details |
| OPI | Ontario Petroleum Institute | | | | Details |
| OPIC | Overseas Private Investment Corporation | | | | Details |
| OPITO | Offshore Petroleum Industry Training Organization UK | | | | Details |
| OPL | Operations Log | | | | Details |
| OPM | Operations Procedure Manual | | | | Details |
| OPMG | Opportunity & Project Management Guide | | | | Details |
| opn | open(ed)(ing) | | | | Details |
| OPO | overseas procurement office | | | | Details |
| opp | opposite | | | | Details |
| opq | opaque | | | | Details |
| opr | operator | | | | Details |
| OPR | Orienting Perforating Service | | | | Details |
| OPRES | Overpressure Log | | | | Details |
| OPS | Operations | | | | Details |
| OPS | One Phase Sampler tool | | | | Details |
| OPT | official potential test | | | | Details |
| OPTL | optional | | | | Details |
| OPTM | OPTIMA® | | | | Details |
| optn | to F/O option to farmout | | | | Details |
| OQS | Obere Quarzarenitserie | | | | Details |
| OR | Oregon PA - Pennsylvania | | | | Details |
| OR | orange | | | | Details |
| Or | Oread | | | | Details |
| OR&A | Operations Readiness & Availability | | | | Details |
| OR&A | Operations Readiness and Assurance | | | | Details |
| ORB | Oil Record Book | | | | Details |
| ORC | Oman Oil Refinery Company | | | | Details |
| ORD | Compensated Bulk Density | | | | Details |
| Ord | Ordovican | | | | Details |
| Ore | a mineral deposit rich enough to be mined commercially | | | | Details |
| ORF | offshore receiving facility | | | | Details |
| orf | orifice | | | | Details |
| org | organic | | | | Details |
| org | organization | | | | Details |
| ORI | Overriding Royalty Interest | | | | Details |
| ORI | Orientation Borehole Corrections | | | | Details |
| ORIAC | Oil Refining Industry Action Committee | | | | Details |
| ORICO | Oriented Core Data Report | | | | Details |
| ORIENT | orientation | | | | Details |
| orif | orifice | | | | Details |
| orig | original. originally | | | | Details |
| orig | original, originally | | | | Details |
| Orisk | Oriskany | | | | Details |
| ORIT | Instrument Orientation Log | | | | Details |
| ORL | Oil Refineries Ltd. Israel | | | | Details |
| ORM | Other Regulated Materials | | | | Details |
| orng | orange | | | | Details |
| ORP | Opportunity Realization Process | | | | Details |
| ORP | Origin Reference Point | | | | Details |
| ORR | Overriding Royalty | | | | Details |
| ORRI | overriding royalty interest | | | | Details |
| ORSANCO | Ohio River Valley Water Sanitation Commission | | | | Details |
| orth | orthoclase | | | | Details |
| OS | operating system | | | | Details |
| OS | overshot | | | | Details |
| OS | oil show | | | | Details |
| Os | Osage | | | | Details |
| OS&D | Over, Short & Damage (Report) | | | | Details |
| OS&F | odor stain and fluorescence | | | | Details |
| OS&Y | outside screw and yoke(valve) | | | | Details |
| OSA | oil-soluble acid | | | | Details |
| OSC | On Scene Commander | | | | Details |
| OSCO | Oil Services Company of Iran | | | | Details |
| OSD | operation shutdown | | | | Details |
| OSF | oil string flange | | | | Details |
| OSFB | Oman Savings and Finance Bank | | | | Details |
| OSH | Open Shelter deck | | | | Details |
| OSH | Oil Show | | | | Details |
| OSHA | Occupational Safety and Health Administration (see comment) | | | | Details |
| OSHA | occupational safety and health administration, US government agency | | | | Details |
| OSHA | Occupational Safety and Health Administration | | | | Details |
| OSHRC | Occupational Safety and Health Review Commission | | | | Details |
| OSI | oil well shut in | | | | Details |
| OSIDP | oil standing in drillpipe | | | | Details |
| OSL | Oil Search Ltd. New Guinea | | | | Details |
| OSO | Oil, Gas & Petrochemicals Supplies Office UK | | | | Details |
| OSP | Orbitolinid, Skeletal Packstone | | | | Details |
| OSR | Oil Steam Ratio | | | | Details |
| OSR | Oil Steam Ratio (primarily used for economics) | | | | Details |
| OSRC | (ADNOC) Oil Spill Response Centre | | | | Details |
| Ost | Ostracod | | | | Details |
| ostn | oil stain | | | | Details |
| OSTOIP | original stock tank oil in place | | | | Details |
| OSW | Orbitolinid, Skeletal Wackestone | | | | Details |
| Osw | Oswego | | | | Details |
| OT | Off Tree | | | | Details |
| OT | On Truck | | | | Details |
| OT | A Well On Test | | | | Details |
| OT | Oil Up To | | | | Details |
| OT | Onshore Terminal | | | | Details |
| OT | open tubing | | | | Details |
| OT | OberTeil (upper part of tool…) | | | | Details |
| OT | overtime | | | | Details |
| OT&S | odor taste & stain | | | | Details |
| OTA | Office of Technology Assessment | | | | Details |
| OTC | Offshore Technology Conference | | | | Details |
| OTD | old total depth | | | | Details |
| OTD | original total depth | | | | Details |
| OTDR | Optical Time Domain Reflectometry | | | | Details |
| OTE | oil-powered total energy | | | | Details |
| OTH | Other | | | | Details |
| OTIP | Operational Testing Implementation Plan | | | | Details |
| OTL | Operations Team Leader | | | | Details |
| Otl | outlet | | | | Details |
| OTM | Other Test Method | | | | Details |
| OTP | Outline Test Programme | | | | Details |
| OTP | One Time Password | | | | Details |
| OTS | oil to surface | | | | Details |
| OTS&F | odor taste stain and fluorescence | | | | Details |
| OU | oil unit | | | | Details |
| OUP | Oil Up To | | | | Details |
| Our | Ouray | | | | Details |
| OUT | Outpost, Lahee classification | | | | Details |
| OUT | Oil Up To | | | | Details |
| OVCH | Oversize Charts | | | | Details |
| overbend | High spot in a pipeline usually installed by field-bending a pipeline joint | | | | Details |
| Ovhd | overhead | | | | Details |
| OVID | Offshore Vessel Inspection Database | | | | Details |
| OVL | ONGC indian company | | | | Details |
| OW | OWners | | | | Details |
| OW | OpenWorks (Halliburton) | | | | Details |
| OW | Oil & Water | | | | Details |
| OWA | Oil Well Automation | | | | Details |
| OWC | Oil Water Contact | | | | Details |
| OWC | oil-water contact | | | | Details |
| OWDD | oil well drilled deeper | | | | Details |
| OWF | oil well flowing | | | | Details |
| OWFWF | oil well from Waterflood | | | | Details |
| OWFWF | oil well from water flood | | | | Details |
| OWG | oil well gas | | | | Details |
| OWPB | oil well plug back | | | | Details |
| OWPB | old well plugged back | | | | Details |
| OWR | Oil Water Ratio (see comment!) | | | | Details |
| OWR | oil | | | | Details |
| OWS | Oily Water Separators | | | | Details |
| OWST | old well sidetracked | | | | Details |
| OWT | One Way Time | | | | Details |
| OWWO | old well workover | | | | Details |
| OWWO | old well worked over | | | | Details |
| ox | oxidized, oxidation | | | | Details |
| oxy | oxygen | | | | Details |
| OXY | Occidental Petroleum Corp. | | | | Details |
| oz | ounce | | | | Details |
| P.O. | Pin Oak | | | | Details |
| P.O. | Post Oak | | | | Details |
| PACO | Process Automation, Control & Optimization | | | | Details |
| Pafco | Pak-Arab Fertilizers Ltd. | | | | Details |
| Paleo | paleontology | | | | Details |
| Paleo | Paleozoic | | | | Details |
| Palo | P Palo Pinto | | | | Details |
| PANO | Producing Assets & New Opportunities | | | | Details |
| Parco | Pak-Arab Refinery Ltd. | | | | Details |
| PARCO | Pak-Arab Refinery Pakistan/Abu Dhabi | | | | Details |
| PBO | Plan and Budget Organization | | | | Details |
| PCOLL | Perforation and Collar | | | | Details |
| PDFOS | Performance drilling (Deutag in Kurdiustan) | | | | Details |
| PDO | Petroleum Development Oman | | | | Details |
| PDO | Petroleum Development Oman Oman | | | | Details |
| pdso | pseudo | | | | Details |
| Pedco | Petroleum Development Corporation | | | | Details |
| perco | percolation | | | | Details |
| PERFO | Perforation Log | | | | Details |
| PERMAGO | Perforaciones Marinas del Golfo S.A. Mexico | | | | Details |
| PERSERO | PT Perusahaan Gas Negara Indonesia | | | | Details |
| PERUPETRO | Peru Petro S.A. Peru | | | | Details |
| PETCO | Petroleum Corporation of Texas | | | | Details |
| PETROBANGLA | Bangladesh Oil, Gas & Mineral Corporation Bangladesh | | | | Details |
| Petrobel | Belayim Petroleum Company | | | | Details |
| PETROBEL | Belayim Petroleum Co. Egypt | | | | Details |
| PETROBRAS | Petroleo Brasileiro, S.A. Brazil | | | | Details |
| PETROCAN | Petroleos de Canarias Spain | | | | Details |
| petrochem | petrochemical | | | | Details |
| PETROCI | Societe Nationale d’Operations Petrolieres de la Cote d’Ivoire Cote d’Ivoire | | | | Details |
| PETRO-COMMERCIAL | Empresa Estatal de Commercializacion y Transporte de Petroles del Ecuador Ecuador | | | | Details |
| PETRO-ECUADOR | Petroleos de Ecuador Ecuador | | | | Details |
| PetroFinance | Petroleum Finance Company | | | | Details |
| PETROGAB | Societe Nationale Petroliere -PETROGAB Gabon | | | | Details |
| PETROGAL | Petroleos de Portugal Portugal | | | | Details |
| PETROGAS | Petroleum Gas Co. Egypt | | | | Details |
| PETROGUIN | National Petroleum Co. of Guinea-Bissau (formerly PETROMINAS) Guinea-Bissau | | | | Details |
| PETRO-INDUSTRIAL | Empresa Estatal de Industrializacion de Petroles del Ecuador Ecuador | | | | Details |
| PETROJAM | Petroleum Corporation of Jamaica Jamaica | | | | Details |
| PETROJET | Petroleum Projects and Technical Consultations Co. Egypt | | | | Details |
| Petrokemya | Arabian Petrochemical Company | | | | Details |
| PETROKEMYA | Arabian Petrochemical Co. Saudi Arabia | | | | Details |
| PETROL | Petrol, A Slovene Oil Company Slovenia | | | | Details |
| PETROM | Petrom RA Romania | | | | Details |
| PETROMED | Petroleos del Mediterraneo Spain | | | | Details |
| PETROMIN | General Petroleum and Mineral Organization Saudi Arabia | | | | Details |
| PETROMINAS | Empresa Nacional de Pesquisa e Exploracao Petroliferas e Mineras EP (now PETROGUIN) Guinea-Bissau | | | | Details |
| PETROMOC | Empresa Nacional Petroles de Moçambique Mozambique | | | | Details |
| PETRON | Petron Corporation (PNOC/Saudi Aramco partnership) Philippines | | | | Details |
| PETRONAS | Petroliam Nasional Bhd. Malaysia | | | | Details |
| PETRONET | Petronet India ltd. India | | | | Details |
| PETRONIC | Empresa Nicaraguense del Petroleo Nicaragua | | | | Details |
| PETRONOR | Petroleos del Norte, S.A. Spain | | | | Details |
| PETROPAR | Petroleos Paraguayos Paraguay | | | | Details |
| PETROPERU | Petroleos del Peru Peru | | | | Details |
| PETRO-PRODUCTION | Empresa Estatal de Exploration y Produccion de Petroleos del Ecuador Ecuador | | | | Details |
| PETROQUISA | Petrobras Quimica S.A. Brazil | | | | Details |
| PETROREP | Societe Petroliere de Recherches Dans La Region Parisienne France | | | | Details |
| PETROSEN | Societe Nationale des Petroles du Senegal Senegal | | | | Details |
| PETROSUR | Petroleos del Sur S.A. Spain | | | | Details |
| PETROTRIN | Petroleum Company of Trinidad & Tobago Ltd. Trinidad & Togago | | | | Details |
| PETRO-Vietnam | Oil and Gas Company Vietnam VIETNAM | | | | Details |
| PETROZAIRE | Entreprise Petroliere du Zaire Zaire | | | | Details |
| PETSOC | Petroleum Society of the Canadian Institute of Mining, Metallurgy and Petroleum | | | | Details |
| PFO | Pressure Fall Off survey (ie in water inj well) | | | | Details |
| PFO | Pressure Fall-off | | | | Details |
| PFO | pressure fall off test – a common injector test or a test after pumping in | | | | Details |
| PGCOA | Pennsylvania Grade Crude Oil Association | | | | Details |
| PGFO | Bottom-hole pressure gauge fall-off | | | | Details |
| PGOR | Produced Gas Oil Ratio | | | | Details |
| PHOL | Photon Log | | | | Details |
| Phos | Phosphoria | | | | Details |
| PHOT | Photo | | | | Details |
| Pilot | a small scale test or trial used to assess the feasibility of a process to a reservoir or field | | | | Details |
| piso | pisolites, pisolitic | | | | Details |
| pl fos | plant fossils | | | | Details |
| PLATO | Pennzoil Offshore Gas Operators | | | | Details |
| PLFO | PROFLOW | | | | Details |
| Plio | Pliocene | | | | Details |
| PLO | pipeline oil | | | | Details |
| PLO | pumping load oil pilot | | | | Details |
| PMO | Program Management Offices | | | | Details |
| PNOC | Philippine National Oil Company Philippines | | | | Details |
| PO | Production Optimization | | | | Details |
| PO | Pump off (to see formation response in drilling between mud weight & ECD) | | | | Details |
| PO | Purchase Order | | | | Details |
| PO | Pull Out | | | | Details |
| PO | peak oil | | | | Details |
| PO | PORTUGAL | | | | Details |
| PO | GeoRressure Development-Failure | | | | Details |
| po | Phrohotite | | | | Details |
| PO | pulled out | | | | Details |
| PO | pumps off | | | | Details |
| POA | Power Of Attorney | | | | Details |
| POA | Plan Of Action | | | | Details |
| POAS | TPAO Marketing Subsidiary Turkey | | | | Details |
| POB | Personnel on Board (offshore rig/ship) | | | | Details |
| POB | plug on bottom | | | | Details |
| POB | pump on beam | | | | Details |
| POBM | Pseudo-Oil-Based Mud | | | | Details |
| POCS | Pacific Outer Continental Shelf | | | | Details |
| POD | Plan Of Development | | | | Details |
| POD | Proof Of Delivery | | | | Details |
| POD | Geopressure Development Deepening | | | | Details |
| Pod. | Podbielniak | | | | Details |
| PoE | Plan of Exploration | | | | Details |
| POE | polyoxyethylenated – a common surfactant group | | | | Details |
| POE | plain one end | | | | Details |
| POF | Permanent Operations Facility | | | | Details |
| POG | Pump Off Gas | | | | Details |
| POG | Production & Operation Geology | | | | Details |
| POGO | Pennzoil Offshore gas Operators | | | | Details |
| POGW | producing oil and gas well | | | | Details |
| POH | Pull Out Of Hole | | | | Details |
| POH | pull out of the hole Also POOH | | | | Details |
| POH | pulled(put) out of hole | | | | Details |
| POHOL | Private Oil Holdings Oman Ltd. Oman | | | | Details |
| pois | poison | | | | Details |
| POL | POLAND | | | | Details |
| pol | polish(ed) | | | | Details |
| POL | Perforating Orientation Log | | | | Details |
| POLICOLSA | Poliolefinas Colombianas S.A. Colombia | | | | Details |
| poly | polymerization, polymerized | | | | Details |
| poly | cl polyethylene | | | | Details |
| polygas | polymerized gasoline | | | | Details |
| polypl | polypropylene | | | | Details |
| POM | Pressure Operational Manual (SLB guidline for using pressure rated pipes) | | | | Details |
| POM | Production Operations Manual (OMV) | | | | Details |
| POM | Preliminary observation memoranda | | | | Details |
| PON | Petroleum Operations Notice (United Kingdom) | | | | Details |
| PONA | parrafins-olefins-napthenes-aromatics | | | | Details |
| Pont | Pontotoc | | | | Details |
| POO | Probability Of Occurance | | | | Details |
| POOH | Pull Out Of Hole | | | | Details |
| POOH | pull out of the hole | | | | Details |
| POOH | pull(put) out of hole | | | | Details |
| POOH/POH | Pull Out Of Hole | | | | Details |
| POP | Proof Of Performance (a function test of the equipement or facility) | | | | Details |
| POP | Proof Of Payment | | | | Details |
| POP | Pay On Production | | | | Details |
| POP | Persistent Organic Pollutant | | | | Details |
| POP | put on production | | | | Details |
| POP | put on pump, installing pump | | | | Details |
| POP | putting on pump | | | | Details |
| POPV | MRPO Hydraulic Pump Output Volume | | | | Details |
| POQ | Piss Off Quickly | | | | Details |
| POR | Density Porosity Log | | | | Details |
| POR | Porosity | | | | Details |
| por | porosity, porous | | | | Details |
| porc | porcelaneous | | | | Details |
| porc | porcion | | | | Details |
| PORMINER | Promotora de Minmercados S.A. Spain | | | | Details |
| poro | porous , porosity | | | | Details |
| POROH | Porosity from Open Hole logs | | | | Details |
| PORT | Pressure Operated Reference Tool | | | | Details |
| port | portable | | | | Details |
| PORTGAS | Sociedad de Producao e Distribucion de Gas S.A. Portugal | | | | Details |
| POS | Probability Of Success | | | | Details |
| POS | Positive | | | | Details |
| pos | position | | | | Details |
| POSFR | Post Fracture Report | | | | Details |
| poss | possible | | | | Details |
| poss | possible(ly) | | | | Details |
| POSTW | Post Well Appraisal Report | | | | Details |
| POSWE | Post Well Summary Report | | | | Details |
| pot | potential | | | | Details |
| pot | dif potential difference | | | | Details |
| POT (able) | POTable water | | | | Details |
| POT/WTR | potable water | | | | Details |
| POTV | Pressure Operated Tester Valve (Expro tool) | | | | Details |
| POTWs | Publicity Owned Treatment Works | | | | Details |
| pour | ASTM pour point(ASTM method) | | | | Details |
| POUV | Pressure Operated Underbalance Valve | | | | Details |
| POW | Power (rig electric power) | | | | Details |
| POW | producing oil well | | | | Details |
| POWC | Present Oil Water Contact (reservoir) | | | | Details |
| POWERS | Parallel Oil Water and Gas Reservoir Simulator | | | | Details |
| POWF | producing oil well, flowing | | | | Details |
| POWP | producing oil well, pumping | | | | Details |
| PPPOT-T | positive pressure pack-off test – tubing | | | | Details |
| PPROA | Panhandle Producers and Royalty Owners Association | | | | Details |
| pr op | present operations | | | | Details |
| predom | predominant | | | | Details |
| PRO | Procedure | | | | Details |
| pro | prorated | | | | Details |
| PROAS | Productos Asfalticos S.A. Spain | | | | Details |
| prob | probable(ly) | | | | Details |
| proc | process | | | | Details |
| PROD | Production Log | | | | Details |
| prod | produced, producing, production | | | | Details |
| Prod | Production in company name | | | | Details |
| prod | produce(ed)(ing)(tion), product(s) | | | | Details |
| PRODESA | Productos de Estireno, S.A. de C.V. Mexico | | | | Details |
| prog | progress | | | | Details |
| proj | projected | | | | Details |
| proj | project(ed)(ion) | | | | Details |
| PROP | property | | | | Details |
| prop | proportional | | | | Details |
| prop | propose(ed) | | | | Details |
| PROPEL | Produtos de Petroleo Lda. Portugal | | | | Details |
| prot | protection | | | | Details |
| PROTE | Production Test Report | | | | Details |
| Protero | Proterozoic | | | | Details |
| PROTEXA | Construcciones Protexa, S.A. de C.V. Mexico | | | | Details |
| Prov | provincial | | | | Details |
| PROX | Proximity Log | | | | Details |
| PROX | Proximity | | | | Details |
| PROX/ML | Proximity Minilog | | | | Details |
| PROXL | Proximity Log | | | | Details |
| PSLOG | Pressure Log | | | | Details |
| PSO | Petroleum System Optimization | | | | Details |
| PSO | Pakistan State Oil Company Ltd. Pakistan | | | | Details |
| PSXO | Bulk volume water (invasion zone) | | | | Details |
| PTTEPO | PTTEP Offshore Investment Co. Ltd. Thailand | | | | Details |
| PZOF | Presentation Zone Offset used in the computation of interpretation zone (PLT interpretation) | | | | Details |
| QABICO | Qatar Hot Briquetted Iron Company | | | | Details |
| QAFCO | Qatar Fertilizer Company | | | | Details |
| QAPCO | Qatar Petrochemical Company | | | | Details |
| QAPCO | Qatar Petroleum Company | | | | Details |
| QASCO | Qatar Steel Company | | | | Details |
| Qo | Oil Rate | | | | Details |
| Qo | oil prod rate | | | | Details |
| qo | flow rate or initial flow rate | | | | Details |
| QOL | Quality Of Living | | | | Details |
| QOS | Quality Operations Support | | | | Details |
| qtzose | quartzose | | | | Details |
| R&O | rust and oxidation | | | | Details |
| R.O. | Red Oak | | | | Details |
| RALOG | running radioactive log | | | | Details |
| RAMCO | Ramco Energy plc UK | | | | Details |
| RASIOM | Raffinerie Siciliane Olii Minerali Italy | | | | Details |
| R-BOP | rotating BOP | | | | Details |
| RBSO | rainbow show of oil | | | | Details |
| RBSOF | rubber ball sand oil frac | | | | Details |
| RCO | returning circulation oil | | | | Details |
| RCOR | Rotary Sidewall Coring Tool | | | | Details |
| RCOR | Rotary Coring Tool | | | | Details |
| RDMO | Rig Down Move Out | | | | Details |
| RDMO | rig down, move off or out | | | | Details |
| RDMO | rigged down, moved out | | | | Details |
| recomp | recomplete(ed)(ion) | | | | Details |
| RECOMP | recompressor | | | | Details |
| recond | recondition(ed) | | | | Details |
| REFCO | Abu Dhabi Refining Company | | | | Details |
| REFOO | re-evaluation for overoptimism | | | | Details |
| reform | reformate(er)(ing) | | | | Details |
| REGANOSA | Regasification subsidiary of SONATRACH Algeria | | | | Details |
| reloc | relocate(ed) | | | | Details |
| Reo. | bath. Reophax bathysiphoni | | | | Details |
| REOR | Reorientation Log | | | | Details |
| REPSOL | Repsol S.A. (formerly “Hispanoil”)(see Repsol-YPF) Spain | | | | Details |
| REPSOL-YPF | Former Hispanoil (Spain) & YPF (Argentina) Spain | | | | Details |
| RESOI | Residual Oil | | | | Details |
| rev out | reverse out | | | | Details |
| rev/O | reversed out | | | | Details |
| RFSO | raised face, slip on | | | | Details |
| rheo | rheostat | | | | Details |
| RHOB | Bulk Density | | | | Details |
| RIGMO | Rig Move | | | | Details |
| RLOF | Rock Load-out Facility | | | | Details |
| RMOGA | Rocky Mountain Oil and Gas Association | | | | Details |
| RNMO | Residual Normal Move Out | | | | Details |
| RO | Ring Out | | | | Details |
| Ro | Vitrinite reflectance, in oil | | | | Details |
| RO | ROMANIA | | | | Details |
| RO | reversed out | | | | Details |
| ro | rose | | | | Details |
| Ro | Rosiclare sand | | | | Details |
| ROA | Return on Assets | | | | Details |
| ROACE | Return on Average Capital Employed | | | | Details |
| ROAR | Regional Review | | | | Details |
| ROB | Remaining On Board | | | | Details |
| Rob | Robulus | | | | Details |
| ROC | Reference Our Cable....(date) | | | | Details |
| ROC | Retention Of Cuttings (Mud term) | | | | Details |
| ROCE | Return on capital employed (same as ROACE, See ROACE) | | | | Details |
| ROCE | return on capital employed | | | | Details |
| ROCK | Retention Of Critical Knowledge | | | | Details |
| ROCT | Rotary Coring Tool | | | | Details |
| ROD | Record of Decision | | | | Details |
| Rod | Rodessa | | | | Details |
| ROE | Radius of Exposure | | | | Details |
| ROF | rich oil fractionator | | | | Details |
| ROGL | rotative gas lift | | | | Details |
| RoHS | Restriction of Hazard Substances | | | | Details |
| ROI | Return On Investment | | | | Details |
| Rok | remove | | | | Details |
| Rok | rock | | | | Details |
| ROL | Re-Order Level | | | | Details |
| ROL | rig on location | | | | Details |
| ROM | Read Only Memory | | | | Details |
| ROM | rough order of magnitude | | | | Details |
| ROM | run of mine | | | | Details |
| RON | Research Octane Number | | | | Details |
| ROP | Rate of Penetration, Rate of Penetration | | | | Details |
| ROP | Rate of Penetration | | | | Details |
| ROPE | really overbalanced perforating, see EOP or extreme overbalanced perforating | | | | Details |
| ROPME | Regional Organization for Protection of Marine Environment | | | | Details |
| ROR | Rate Of Return (Economics) | | | | Details |
| ROR | rate of return | | | | Details |
| RORO | Roll On Roll Off ship | | | | Details |
| ROS | Remaining Oil Saturation (reservoir) | | | | Details |
| ROS | residual oil saturation | | | | Details |
| ROS | Remaining Oil Saturation | | | | Details |
| ROS | remote operating system(station) | | | | Details |
| ROSKO-MNEDRA | Ministry of Fuel & Energy for the Russian Federation Russia | | | | Details |
| ROSS | Remotely Operated Sliding Sleeves | | | | Details |
| ROT | Remote Operated Tool | | | | Details |
| rot | rotary, rotate, rotator | | | | Details |
| ROTLX | Reference Our TeLeX ...(date) | | | | Details |
| ROU | Radius Of Uncertainty | | | | Details |
| ROU | ROMANIA | | | | Details |
| ROV | Remotely Operated Vehicle, used for subsea construction and maintenance | | | | Details |
| ROV | Remotely Operated Vehicle | | | | Details |
| ROV | remote operated vehicle, usually an unmanned underwater work vehicle | | | | Details |
| ROV/WROV | Remotely Operated Vehicle/WorkClass Remotely Operated Vehicle, used for subsea construction and maintenance | | | | Details |
| ROW | Right-of-Way | | | | Details |
| ROW | Right of Way | | | | Details |
| ROWS | Remote Operator Workstation | | | | Details |
| roy | royalty | | | | Details |
| ROZ | Recoverable Oil Zone | | | | Details |
| ROZ | residual oil zones | | | | Details |
| RROCK | Routine Rock Properties Report | | | | Details |
| RSO | Red Sea Oil Corpo-Ration | | | | Details |
| RSO | Red Sea Oil Corporation Tanzania | | | | Details |
| RTO | Real Time Operations | | | | Details |
| RTO | regional transmission operators | | | | Details |
| RTOC | Real Time Operation Center | | | | Details |
| RTOC | Real Time Operations Center | | | | Details |
| RTOS | Real Time Operations Center | | | | Details |
| RWO | rig workover | | | | Details |
| RXO | Resistivity of the invaded zone | | | | Details |
| Rxo | resistivity, flushed zone | | | | Details |
| S O | south offset | | | | Details |
| S&O | stain & odor | | | | Details |
| S&O | stain and odor | | | | Details |
| S/O | Space out | | | | Details |
| S/O | Slack Off | | | | Details |
| S7PO | SenTREE 7 Pack Off Sub | | | | Details |
| SACROC | Scurry Area Canyon Reef Operators Committee | | | | Details |
| SADCOP-MAHRUKAT | Syrian Storing and Distributing Co., Petroleum Products Syria | | | | Details |
| SAFCO | Saudi Arabian Fertilizer Company | | | | Details |
| SAMCOM | Saudi Arab Manpower Committee | | | | Details |
| SARPOM | Societa Azionaria Raffinazione Olli Minerali Italy | | | | Details |
| Sasco | Sohar Aluminium Smelter Company | | | | Details |
| SASOL | South African Coal, Oil and Gas Corp. Ltd. South Africa | | | | Details |
| Saudi Aramco | Saudi Arabian Oil Company | | | | Details |
| SBOP | Surface Blow Out Preventer | | | | Details |
| Sceco | Saudi Consolidated Electric Company | | | | Details |
| SCECO | Saudi Consolidated Electrical Company | | | | Details |
| Scholle | Block (a compartment of reservoir) Geology, | | | | Details |
| SCO | Synthetic Crude Oil | | | | Details |
| scolc | scolescodonts | | | | Details |
| SCON | Sand Consolidation | | | | Details |
| SCOT | Shell Claus Off-gas Treating | | | | Details |
| SCRO | Subsea Control Room | | | | Details |
| Sd SO | sand showing oil | | | | Details |
| SDO | shut down orders | | | | Details |
| SDO | show of dead oil | | | | Details |
| SDO | shut down for orders | | | | Details |
| SDOF | sand oil fractured | | | | Details |
| sdoilfract | sand-oil fracked | | | | Details |
| SDON | shut down overnight | | | | Details |
| SDWO | shut down awaiting orders | | | | Details |
| Semi (or Semi-Sub) | Semi-Submersible Drilling Rig | | | | Details |
| SEO | seal oil | | | | Details |
| SEWOP | self-elevating work platform | | | | Details |
| SFO | show of free oil | | | | Details |
| SG&O | show gas & oil show | | | | Details |
| SG&O | show gas and oil | | | | Details |
| SGCO | gas cut oil | | | | Details |
| SGCO | slightly gas-cut oil | | | | Details |
| SHO | Stab and Hinge Over | | | | Details |
| SHOCK | Shcok Log | | | | Details |
| SHOWL | Show Log | | | | Details |
| SIGTTO | Society of International Gas Tanker and Terminal Operators | | | | Details |
| SIMCON | Simultaneous Construction | | | | Details |
| SimOps | Simultaneous Operations | | | | Details |
| SINOPEC | Chinese Petroleum and Chemical CorporationChina | | | | Details |
| SIOW | shutin oil well | | | | Details |
| SIPETROL | Sociedad Internacional Petrolera S.A. Chile | | | | Details |
| SISCO | Saudi Industrial Services Company | | | | Details |
| SIWOP | shutin, waiting on potential | | | | Details |
| SMO | Suction Module | | | | Details |
| SNEPCo | Shell Nigeria Exploration and Production Company | | | | Details |
| SNOC | Seychelles National Oil Co. Ltd. Seychelles | | | | Details |
| SO | Shirttail Damage | | | | Details |
| So | oil Saturation | | | | Details |
| SO | Slack Off | | | | Details |
| So | Oil Saturation. | | | | Details |
| SO | SOMALIA | | | | Details |
| SO | South Dakota | | | | Details |
| so | show of oil | | | | Details |
| SO | shake out | | | | Details |
| SO | shaled out | | | | Details |
| SO | side opening | | | | Details |
| SO | slip on | | | | Details |
| SO&G | show of oil & gas | | | | Details |
| SO&G | show oil and gas | | | | Details |
| SO&GCM | slightly oil & as cut mud | | | | Details |
| SO&GCM | slightly oil- and gas-cut mud | | | | Details |
| SO&W | show oil & Water slightly | | | | Details |
| SO&W | show oil and water | | | | Details |
| SO2 | sulfur dioxide | | | | Details |
| Soak | allowing a solvent to be in contact with a deposit for a period of time | | | | Details |
| SOAP | Simple Object Access Protocol | | | | Details |
| SOB | Sondenbehandlung und Bohren | | | | Details |
| SOB | Standard Operations Procedures | | | | Details |
| SOBM | Synthetic Oil Based Mud | | | | Details |
| SOC | Shell Only Cost (for Shell account) | | | | Details |
| SOC | screen only completion | | | | Details |
| SOC | start of cycle | | | | Details |
| SOC | Sirte Oil Company Libya | | | | Details |
| Socal | Standard Oil Company of California | | | | Details |
| Socar | State Oil Company of Azerbaijan | | | | Details |
| SOCAR | State Oil Company of the Azerbaijan Republic Azerbaijan | | | | Details |
| SOCDET | Sydney Oil Co. Drilling & Exploration Australia | | | | Details |
| SOCIR | Societe Congo-Italianne de Raffinage Dem. Rep. of the Congo | | | | Details |
| SOCM | oil cut mud slightly oil cut | | | | Details |
| SOCM | slight oil-cut mud | | | | Details |
| SOCMI | synthetic organic chemical manufacturing industry | | | | Details |
| SOCMI | Synthetic Organic Chemical Industry | | | | Details |
| SOCO | Single most overruling communication objective | | | | Details |
| Socony | Standard Oil Company of New York | | | | Details |
| socsw | salt water slightly oil cut water | | | | Details |
| SOCSW | slight oil-cut salt water | | | | Details |
| socw | slightly oil cut water | | | | Details |
| SOCW | slight oil-cut water | | | | Details |
| SOCWB | slightly oil cut water blanket | | | | Details |
| SOCWB | slight oil-cut water blanket | | | | Details |
| SOCWC | slightly oil cut water cushion | | | | Details |
| SOCWC | slight oil-cut water cushion | | | | Details |
| sod | gr sodium-based grease | | | | Details |
| SOE | Sequence Of Events | | | | Details |
| SOE | screwed on one end | | | | Details |
| SOF | Statement Of Facts. | | | | Details |
| SOF | Solar Occultation Flux | | | | Details |
| SOF | sand-oil fracture | | | | Details |
| SOGARA | Societe Equatoriale de Raffinage Gabon | | | | Details |
| SOGAT | Sour Oil & Gas Advanced Technology | | | | Details |
| SOGT | Sabah Oil & Gas Terminal | | | | Details |
| SOGUIP | Societe Guineane de Petroles Guinea | | | | Details |
| SOH | shot open hole | | | | Details |
| SOH | started out of hole | | | | Details |
| SOH | With Openhole Data Included | | | | Details |
| SOHIC | Stress-oriented Hydrogen-induced Cracking | | | | Details |
| SOHIO | Standard Oil Co. of Ohio | | | | Details |
| Soi | oil Saturation initial | | | | Details |
| sol | solenoid | | | | Details |
| sol | solids | | | | Details |
| SOLAS | Safety of Life at Sea | | | | Details |
| soln | solution | | | | Details |
| solv | solvent | | | | Details |
| SOM | Swedish Official Measure | | | | Details |
| SOM | SOMALIA | | | | Details |
| som | somastic | | | | Details |
| SOMALGAZ | Societe Mixte Algerienne de Gaz Algeria | | | | Details |
| somct | somastic coated | | | | Details |
| SOMO | Iraq's State Oil Marketing Organisation | | | | Details |
| SON | Sonan Log | | | | Details |
| SONACOL | Sociedad Nacional de Oleoductos Ltda. Chile | | | | Details |
| SONACPP | Societe Nationale de Commercialisation des Produits Petrolieres Benin | | | | Details |
| SONANGOL | Sociedade Nacional de Combustiveis Sonangol Angola | | | | Details |
| SONATRACH | Entreprise Nationale Sonatrach Algeria | | | | Details |
| SONCB | Sonic Calibration Log | | | | Details |
| SONELGAZ | Societe Nationale d’Electricite et du Gaz Algeria | | | | Details |
| SONIDEP | Societe Nigerienne de Produits Petroliers Niger | | | | Details |
| SONL | Sonic | | | | Details |
| SONL | sonic log | | | | Details |
| SONPETROL | Sondeos Petroliferos, S.A. Spain | | | | Details |
| SONRE | Sonic Calibration Report | | | | Details |
| SONWR | Sonic Waveform Report | | | | Details |
| SONWV | Sonic Waveform Log | | | | Details |
| SOOH | started out of hole | | | | Details |
| SOOH | strapped out of hole | | | | Details |
| SOP | Standard Operating Procedure | | | | Details |
| SOP | standard operating procedures | | | | Details |
| SOP | standard operational procedure | | | | Details |
| SOP | Optical | | | | Details |
| SOPC | Suez Oil Processing Company Egypt | | | | Details |
| SOPEP | Shipboard oil pollution emergency plan | | | | Details |
| SOPOR | Sociedad Distribuidora de Cumbustiveis S.A. Portugal | | | | Details |
| SOQUIP | Societe Quebecoise d’Initiatives Petrolieres Canada | | | | Details |
| SOR | Statement For Requirments (see comment) | | | | Details |
| SOR | Steam Oil Ratio (HO projects) | | | | Details |
| Sor | residual oil Saturation (oil that is immobile) | | | | Details |
| SOR | Statement of Requirements | | | | Details |
| SOR | start of run | | | | Details |
| SOR | Sharjah Oil Refining Co. Ltd. Emir. of Sharjah | | | | Details |
| SORC | Sharjah Oil Refining Company | | | | Details |
| Sorg | Residual Oil Saturation after gas flood | | | | Details |
| sort | sorted(ing) | | | | Details |
| Sorw | residual oil Saturation to waterflood | | | | Details |
| Sorw | Residual Oil Saturation after water flood | | | | Details |
| SOS | Senior Onsite Supervisor | | | | Details |
| SOS | Scope of Services | | | | Details |
| SOS | shear out sub | | | | Details |
| SOTETEL | Société Tunisienne d’Entreprises de Télécommunications | | | | Details |
| SOTRAL | Societe de Transport d’Arzews Algeria | | | | Details |
| SOV | screened orifice valve | | | | Details |
| SOV | solenoid – operated valves | | | | Details |
| SOW | Scope Of Work | | | | Details |
| SOW | Slip-On Wellhead | | | | Details |
| SOW | Slack Off Weight (rig) | | | | Details |
| sow | socket weld | | | | Details |
| SOW_Slip | On Wellhead | | | | Details |
| SOx | Sulphur Oxides | | | | Details |
| SOx | sulfur oxides | | | | Details |
| SOX | oxides of sulfur | | | | Details |
| Spiro.b. | Spiroplectammina barrowi | | | | Details |
| spl top | sample top | | | | Details |
| SPOC | Single Point of Contact | | | | Details |
| SPOL | Saudi Petroleum Overseas Ltd. Saudi Arabia | | | | Details |
| SPOP | Spontaneous Potential Log | | | | Details |
| SPROF | Seismic Profile | | | | Details |
| SRO | Surface Read-Out | | | | Details |
| SrSO4 | strontium sulfate | | | | Details |
| SSG&O | slight show gas & oil | | | | Details |
| sso | slight show oil | | | | Details |
| SSO | slight show of oil | | | | Details |
| SSO&G | slight show oil & gas | | | | Details |
| SSO&G | slight show of oil and gas | | | | Details |
| STAATSOLIE | Staatsolie Maatschappij Suriname NV (State Oil Co. Suriname NV) Suriname | | | | Details |
| STATOIL | Den Norske Stats Oljeselskap AS Norway | | | | Details |
| STBOPD | Stock Tank Barrels Oil Per Day (oil prod rate) | | | | Details |
| steno | stenographer | | | | Details |
| STETHO | Stethoscope | | | | Details |
| STO | Stock Tank Oil | | | | Details |
| STOD | South Tunisia Oil Development | | | | Details |
| STOIIP | Stock Tank Oil Initially In Place | | | | Details |
| stoip | stock tank oil in place | | | | Details |
| STOOIP | Stock Tank Original Oil In Place | | | | Details |
| STOP | Safety Training Observation Program | | | | Details |
| stor | storage | | | | Details |
| STROH | strap out of hole | | | | Details |
| strom | stromatoporoid | | | | Details |
| STRONGER | State Review of Oil and Natural Gas Environmental Regulation, Inc | | | | Details |
| STRONGER | State Review of Oil and Natural Gas Environmental Regulations | | | | Details |
| styo | styolite, styolitic | | | | Details |
| Suco | Suez Oil Company | | | | Details |
| SUCO | Suez Oil CompanyEgypt | | | | Details |
| SUPO | Surface Use Plan of Operations | | | | Details |
| SWION | shut well in overnight | | | | Details |
| SWOP | Sample Well On Paper (exercise) | | | | Details |
| SWOP | standard workover procedure | | | | Details |
| SWOT | Strengths, Weaknesses, Opportunities, and Threats (see comment) | | | | Details |
| SWOT | Strengths, Weaknesses, Opportunities and Threats | | | | Details |
| SXO | Saturation of the invaded zone | | | | Details |
| SYCOPOL | Oil Spill Control Assn. of France France | | | | Details |
| SZAFCO | South Zaafarana Oil Company | | | | Details |
| T&OE | Technical & Operational Excellence | | | | Details |
| T.O. | temperature observation | | | | Details |
| T/Box | terminal box | | | | Details |
| TAGOGR | Thermally Assisted Gas/Oil Gravity Drainage | | | | Details |
| TAMOIL | Subsidiary of NOC Libya Libya | | | | Details |
| TCO | Total Cost of Operations | | | | Details |
| TECOP | Technical Economic Commercial Organizational Politico Societal | | | | Details |
| TEOR | thermal enhanced oil recovery | | | | Details |
| TEOTWAWKI | The End of the World as We Know It (and I feel fine) | | | | Details |
| Tepco | Tokyo Electric Power Company | | | | Details |
| TETCO | Texas Eastern Transmission Corp. | | | | Details |
| TGO | TOGO | | | | Details |
| TGOR | Total Gas Oil Ratio (GOR uncorrected for gas lift gas present in the production fluid) | | | | Details |
| Throw | a fault’s vertical displacement | | | | Details |
| TIDCO | Tamil Nadu Industrial Development Corporation | | | | Details |
| Timpo | Timpoweap | | | | Details |
| TIOGE | Turkmenistan International Oil and Gas Conference | | | | Details |
| TIPRO | Texas Independent Producers and Royalty Owners Association | | | | Details |
| TLO | Tight Light Oil | | | | Details |
| TLOG | Technical Log | | | | Details |
| TLROP | Tehnical Limit Rate of Penetration | | | | Details |
| TO | Task Order | | | | Details |
| TO | TOGO | | | | Details |
| TO | TONGA | | | | Details |
| TO | Temperature Observation | | | | Details |
| TO | tool open | | | | Details |
| TOBE | thread on both ends | | | | Details |
| TOBENA | To Be Named | | | | Details |
| TOC | Top Of Cement | | | | Details |
| TOC | Total Organic Content/Carbon | | | | Details |
| TOC | Total Organic Compound | | | | Details |
| TOC | total organic compounds | | | | Details |
| TOC | tag open cup(flash) | | | | Details |
| TOCP | top of cement plug | | | | Details |
| TOD | The Oil Drum | | | | Details |
| TOD | Time Of Day | | | | Details |
| Tod | Todilto | | | | Details |
| toe | Tons of Oil Equivalent | | | | Details |
| TOE | Target Of Evaluation | | | | Details |
| TOE | threaded one end | | | | Details |
| TOEFL | Test for English as a Foreign Language | | | | Details |
| TOF | Top Of Fish | | | | Details |
| TOFD | Time of first data sample (on seismic trace) | | | | Details |
| TOFS | Time Out for Safety | | | | Details |
| TOFS | Time of first surface sample (on seismic trace) | | | | Details |
| TOH | Trip Out Of Hole | | | | Details |
| TOI | Transocean International (Rig co) | | | | Details |
| TOJ | Time Of Job | | | | Details |
| TOL | Top Of Liner | | | | Details |
| tol | tolerance | | | | Details |
| tolu | toluene | | | | Details |
| TOM | Total Oil Marine plc UK | | | | Details |
| TON | TONGA | | | | Details |
| Tonk | Tonkawa | | | | Details |
| tons | tons | | | | Details |
| tons/cd | tons per calendar day | | | | Details |
| tons/yr | tons per year | | | | Details |
| TOOH | Trip Out Of Hole | | | | Details |
| TOOH | trip out of the hole | | | | Details |
| TOP | Taking Outward Pilot | | | | Details |
| TOP | testing on pump | | | | Details |
| TOP | Tedcastles Oil Products Ltd. Ireland | | | | Details |
| topg | topping | | | | Details |
| topo | topographic, topography | | | | Details |
| TOPS | turned over to producing section | | | | Details |
| TOPU | Topsides Umbilical Termination Unit | | | | Details |
| TOR | Terms Of Reference | | | | Details |
| Tor | Torque | | | | Details |
| Tor | Toronto | | | | Details |
| TOR | Tema Oil Refinery Ghana | | | | Details |
| TORAN | Torque and Drag Analysis | | | | Details |
| TORC | Thai Oil Refinery Co. Thailand | | | | Details |
| Toro | Toroweap | | | | Details |
| TORT | Tortuosity | | | | Details |
| TORT | tearing out rotary tools | | | | Details |
| TOS | Top Of Screen, Top Of Sand | | | | Details |
| TOS | top of salt | | | | Details |
| tot | total | | | | Details |
| TOTAL | Total Fina Elf (merger of former CFP, PetroFina, Elf Aquitaine) France | | | | Details |
| TOTP | turn over to production | | | | Details |
| Tow | Towanda | | | | Details |
| TPAO | Turkiye Petrolleri AO | | | | Details |
| TPAO | Turkish Petroleum Corp. (Turkiye Petrolleri Anonim Ortakligi) Turkey | | | | Details |
| TPOC | Turkish Petroleum Overseas Company | | | | Details |
| TPOC | Turkish Petroleum Overseas Company Turkey | | | | Details |
| TRANSCO | Transcontinental Gas Pipe Line Corp. | | | | Details |
| trilo | trilobite | | | | Details |
| Trip out | To remove the drillstring from the wellbore. | | | | Details |
| TRO | to be conditioned for oil | | | | Details |
| TROIF | Total Recordable Occupational Incident Frequency | | | | Details |
| TSO | Tip Screen Out | | | | Details |
| TSO | see Tip Screenout | | | | Details |
| TTFWO | time to first workover | | | | Details |
| TTO | TRINIDAD AND TOBAGO | | | | Details |
| TTOC | Theoretical Top Of Cement | | | | Details |
| TWOP | The Well On Paper exercize | | | | Details |
| UBHO | Universal Bottom Hole Orientation (sub) | | | | Details |
| UBO | Under Balanced Operations | | | | Details |
| UBO | Under Balanced Operation | | | | Details |
| UBO | underbalance operations | | | | Details |
| UFO | Unable to Flow and Observe (inactive string category) | | | | Details |
| UKOOA | United Kingdom Offshore Operators Association | | | | Details |
| UKOOA | UK Offshore Operators’ Assn. Ltd. UK | | | | Details |
| UKOOG | United Kingdom Onshore Operators Group | | | | Details |
| unconf | underreaminq | | | | Details |
| unconf | unconformity | | | | Details |
| uncons | unconsolidated | | | | Details |
| unconsol | unconsolidated | | | | Details |
| UNESCO | United Nations Educational, Scientific and Cultural Organization | | | | Details |
| UNIKOM | UN Iraq-Kuwait Observer Force | | | | Details |
| UNOCAL | Union Oil of California | | | | Details |
| UNSCOM | United Nations Special Commission | | | | Details |
| UO | Unconventional Oil | | | | Details |
| uo | oil viscosity | | | | Details |
| UOCO | Union Oil Company | | | | Details |
| UOM | Unit Of Measurement | | | | Details |
| UOP | Universal Oil Products | | | | Details |
| UOP | Universal Oil Products Company | | | | Details |
| UUOA | Unitization & Unit Operating Agreement | | | | Details |
| Vee door | Vee door | | | | Details |
| VHO&GCM | very_ heavily (highly) oil & gas cut mud | | | | Details |
| VHO&GCM | very heavily(highly) oil and gas-cut mud | | | | Details |
| VHO&GCSW | very_ heavily (highly) oil & gas cut salt water | | | | Details |
| VHO&GCSW | very heavily(highly) oil and | | | | Details |
| VHO&GCW | very heavily (highly) oil & gas cut water | | | | Details |
| VHO&GCW | very heavily(highly) oil and gas-cut water | | | | Details |
| VHOCM | very heavily (highly) oil cut mud | | | | Details |
| VHOCM | very heavily(highly) oil-cut mud | | | | Details |
| v-HOCM | very heavily oil-cut mud | | | | Details |
| VHOCSW | very heavily (highly) oil cut salt water | | | | Details |
| VHOCSW | very heavily(highly) oil-cut salt water | | | | Details |
| VHOCW | very heavily (highly) oil cut water | | | | Details |
| VHOCW | very heavily(highly) oil-cut water | | | | Details |
| VITOL | Vitol and global subsidaries Netherlands | | | | Details |
| VO | Variation Order | | | | Details |
| VO | Variation Order (Change Order too) | | | | Details |
| VOC | Volatile Organic Compounds | | | | Details |
| VOC | volatile organic carbon | | | | Details |
| VOC | Volatile Organic Compound | | | | Details |
| VOCs | Volatile Organic Compounds | | | | Details |
| Vogts | Vogtsberger | | | | Details |
| VOI | Value Of Information | | | | Details |
| VOI | Value of Investment | | | | Details |
| Voids | holes, blanks spots or empty areas | | | | Details |
| VOL | Volume | | | | Details |
| vol% | volume-percent | | | | Details |
| vol. | eff. volumetric efficiency | | | | Details |
| VOLT | voltage | | | | Details |
| VOR | Variation Order Request | | | | Details |
| VOST | Veba Oil Supply & Trading GmbH Germany | | | | Details |
| VOWD | Value Of Work Done | | | | Details |
| VSMOW | Vienna Standard Mean Ocean Water | | | | Details |
| VSO&GCM | very slightly oil & gas cut mud | | | | Details |
| VSO&GCM | very slightly oil and gas-cut mud | | | | Details |
| VSO&GCSW | very slightly oil & gas cut salt water | | | | Details |
| VSO&GCSW | very slightly oil and gas-cut salt water | | | | Details |
| VSOCM | very slightly oil cut mud | | | | Details |
| VSOCM | very slightly oil-cut mud | | | | Details |
| vsocsw | very slightly oil cut salt water | | | | Details |
| VSOCSW | very slightly oil-cut salt water | | | | Details |
| vsocw | very slightly oil cut water | | | | Details |
| VSOCW | very slightly oil-cut water | | | | Details |
| VSPRO | Vertical Seismic Profile | | | | Details |
| vsso | very slight show oil | | | | Details |
| VSSO | very slight show of oil | | | | Details |
| W.O.B. | weight on bit | | | | Details |
| W/O | Without | | | | Details |
| W/O | west offset | | | | Details |
| W/SSO | water with slight show of oil | | | | Details |
| W/sulf O | water with sulfur odor | | | | Details |
| WACOG | Weighted Average Cost of Gas | | | | Details |
| WBOSP | Wispy-laminated, Burrowed, Orbitolinid, Skeletal Packstone | | | | Details |
| WBOSW | Wispy-laminated, Burrowed, Orbitolinid, Skeletal Wackestone | | | | Details |
| WCCON | Whether Custom Cleared Or Not | | | | Details |
| WCO | Well Control | | | | Details |
| wco | water cut oil | | | | Details |
| WCO | water-cut oil | | | | Details |
| WeCTOGA | West Central Texas Oil and Gas Association | | | | Details |
| Wepco | Western Desert Petroleum Company | | | | Details |
| WEPCO | Western Desert Petroleum Company Egypt | | | | Details |
| WFO | Wide Fucking Open (no choke) | | | | Details |
| WGEO | Well Geophone Report | | | | Details |
| WHO | World Health Organization | | | | Details |
| WIBON | Whether In Berth Or Not | | | | Details |
| WIFPON | Whether In Free Praqtique Or Not | | | | Details |
| WIO | working interest owners | | | | Details |
| WIOP | well integrity operations procedure | | | | Details |
| WIPON | Whether In Port Or Not | | | | Details |
| wko | workover | | | | Details |
| WKOR | work over rig | | | | Details |
| wkor | workover rig | | | | Details |
| WLTOHC | WaterLine-TO-HatchCoaming (distance) | | | | Details |
| WNSO | water not shut off | | | | Details |
| WO | Work Over | | | | Details |
| WO | Well in Work Over | | | | Details |
| WO | Washed Out Bit | | | | Details |
| WO | Wait On… | | | | Details |
| WO | Wash Out (well bore) | | | | Details |
| WO | workover | | | | Details |
| WO | Wildcat out post | | | | Details |
| WO | waiting on | | | | Details |
| WO | wash oil | | | | Details |
| WO | wash over | | | | Details |
| wo | washout | | | | Details |
| WO | wildcat outpost, dry | | | | Details |
| WO | work order | | | | Details |
| WO/O | Waiting on Orders | | | | Details |
| WOA | Well Operations Authorization | | | | Details |
| WOA | waiting on acid | | | | Details |
| WOA | waiting on allowable | | | | Details |
| WOB | Weight On Bit | | | | Details |
| WOB | waiting on battery | | | | Details |
| WOC | Wait on Cement | | | | Details |
| WOC | Water Oil Contact (or Oil Water Contact) | | | | Details |
| WOC | waiting on cement or water oil contact | | | | Details |
| WOC | waiting on cement | | | | Details |
| WOC | Wahe Oil Company Libya | | | | Details |
| WOCR | waiting on completion rig | | | | Details |
| WOCT | Wait On Cement Transport | | | | Details |
| WOCT | waiting on cable or completion tools, standard tools or completion unit | | | | Details |
| WOCT | waiting on cable tools or completion tools | | | | Details |
| WOD | Waiting On Daylight | | | | Details |
| WOD | Wildcat out post deepening | | | | Details |
| WODP | waiting on drillpipe | | | | Details |
| WOE | Wait on Equipment | | | | Details |
| WOE | Well Operations Engineer (a key person of Well services) | | | | Details |
| WOE | waiting on engineering | | | | Details |
| WOE | successful wildcat outpost | | | | Details |
| WOG | WithOut Guarantee. | | | | Details |
| WOG | waiting on geologist | | | | Details |
| WOG | water oil or gas | | | | Details |
| WOGA | Western Oil & Gas Association | | | | Details |
| WOH | Weight On Hook | | | | Details |
| WOI | Waiting On Ice | | | | Details |
| Wolfc | Wolfcamp | | | | Details |
| WOM | Wait(ing) on Material | | | | Details |
| WOO | Wait on Order | | | | Details |
| WOO | waiting on orders | | | | Details |
| Wood | Woodside | | | | Details |
| Woodf | Woodford | | | | Details |
| WOP | Wait on Pill (e.g. wait on LCM pills) | | | | Details |
| WOP | waiting on pump | | | | Details |
| WOP | waiting on permit | | | | Details |
| WOP | waiting on pipe | | | | Details |
| WOP | waiting on plastic | | | | Details |
| WOPE | waiting on production equipment | | | | Details |
| WOPL | waiting on pipe line | | | | Details |
| WOPL | waiting on pipeline | | | | Details |
| WOPT | waiting on potential test | | | | Details |
| WOPU | waiting on pumping unit | | | | Details |
| WOR | Water-Oil Ratio | | | | Details |
| WOR | water oil contact | | | | Details |
| WOR | Wildcat outpost redrill | | | | Details |
| WOR | waiting on rig or rotary | | | | Details |
| WORKO | Workover | | | | Details |
| Worm | an inexperienced worker | | | | Details |
| WORT | waiting on rotary tools | | | | Details |
| WOS | West of Shetland, oil province on the UKCS | | | | Details |
| WOS | Wait On Slot | | | | Details |
| WOS | West of Shetlands | | | | Details |
| WOS | washover string | | | | Details |
| WOSP | waiting on state potential | | | | Details |
| WOST | waiting on standard tools | | | | Details |
| WOT | Wait On Transport | | | | Details |
| WOT | waiting on test or tools | | | | Details |
| WOT&C | waiting on tank and connection | | | | Details |
| WOW | Wait on Weather | | | | Details |
| WOW | Wait(ing) On Weather | | | | Details |
| WOW | waiting on Weather | | | | Details |
| WOX | Wildcat outpost workover | | | | Details |
| WROV | work removely operated vehicle | | | | Details |
| WSO | Water Shut Off | | | | Details |
| WSO | Water Shut-Off | | | | Details |
| WSO | water shutoff | | | | Details |
| WSOG | Well Specific Operation Guidelines | | | | Details |
| WSOK | water shut off approval | | | | Details |
| WSONG | water shutoff no good | | | | Details |
| WSOOK | water shutoff OK | | | | Details |
| WSSOF | WSS Offset Profile | | | | Details |
| WTO | World Trade Organization | | | | Details |
| WTO | World Trade Organization — | | | | Details |
| XHO | HOWLAND ISLAND | | | | Details |
| XLOT | Extended Leak Off Test | Same as ELOT | | | Details |
| XO | Cross-Over | | | | Details |
| XO | KOSOVO | | | | Details |
| XO | crossover | | | | Details |
| XOM | Exxon Mobil | | | | Details |
| XO-sub | crossover sub | | | | Details |
| XOV | Cross-Over Valve | | | | Details |
| X-over | crossover | | | | Details |
| XPHLOC | Crossplot Selection for XPHI | | | | Details |
| XPOR | Crossplot Porosity | | | | Details |
| Yoak | Yoakum | | | | Details |
| YORC | Yemen Oil Refining Company | | | | Details |
| YUKONG | S K Corporation Korea | | | | Details |
| YUKOS | Derived from YUganskneftegas+KuibishevnefteOrgSintez Russia | | | | Details |
| ZADCO | Zakum Development Company | | | | Details |
| ZADCO | Zakum Development Co. Abu Dhabi | | | | Details |
| ZAO | BNK CJSC Baltiskaya Nefteprevalochnaya Kompaniya Russia | | | | Details |
| ZOI | Zone Of Interest | | | | Details |
| ZOI | Zone Of Influence | | | | Details |
| ZOK | Zement OberKante (can be obtained from Temp. Log or CBL) | | | | Details |
| OCPS | Organically Complexed Polymer systems | | | | Details |
| H2Zero | See OCPS | | | | Details |
| OCP | Organically Complexed Polymers | | | | Details |
| OIM | Operations, Integrity & Maintenance | | | | Details |
| NEO | Non Explosive Oilfield (products) | | | | Details |
| ICOFC | Iranian Central Oil Fields Company | | | | Details |
| LOPC | Loss of Primary Containment | | | | Details |
| MOP | Ministry of Petroleum | | | | Details |
| NIORDC | National Iranian Oil Refining & Distribution Company | | | | Details |
| BOO | Build-Own-Operate | | | | Details |
| NICO | Naftiran Intertrade Company | | | | Details |
| BPO | Budget and Planning Organization | | | | Details |
| IDRO | Iran Development and Reconstruction Organization | | | | Details |
| PIHO | Petroleum Industry Health Organization | | | | Details |
| AOGC | Arvandan Oil & Gas Company | | | | Details |
| POGC | Pars Oil & Gas Company | | | | Details |
| NISOC | National Iranian South Oil Company | | | | Details |
| vorb | Vorbreitung (preparations…) | | | | Details |
| OÖ | OberÖsterreich | | | | Details |
| OOE | OberÖsterreich | | | | Details |
| TO | Technology Owner | | | | Details |
| Son | Sonde | Well | | | Details |
| Hor | Horizont | layer | | | Details |
| BEO | Beobachtungssonde | Observation well | | | Details |
| LÖSST | Lebenölsammelstation | Oil gathering station | | | Details |
| LOESST | Lebenölsammelstation | Oil gathering station | | | Details |
| LÖMST | Lebenölmessstation | Oil measuring station | | | Details |
| LOEMST | Lebenölmessstation | Oil measuring station | | | Details |
| PRODM | Production Method | | | | Details |
| LOGDIR | Logging Direction Up or Down | | | | Details |
| CHOKE | Choke size | | | | Details |
| LSO | Low Sulphur Oil | | | | Details |
| PO | Project Owner | | | | Details |
| WOA | Work Over Assessment | | | | Details |
| ko | Kompletierung | | | | Details |
| So | Sonde (well..) | | | | Details |
| OSV | Obertagesondenventil | | | | Details |
| SSOW | Safe System Of Work | | | | Details |
| CO | Controlling | | | | Details |
| ZOS | Zuordnungsschlüssel | | | | Details |
| OFIP | Original Fluid In Place | | | | Details |
| OP | Overburden Pressure | | | | Details |
| S/O | Son Of xxx (arabic way of naming people…) | | | | Details |
| CIO | Chief Information Officer | | | | Details |
| CTO | Chief Technology Officer | | | | Details |
| PHXO | PHIE * SXO | | | | Details |
| VDOL | Volume of Dolomite | | | | Details |
| POK | Perforation Oberkante | | | | Details |
| sto | stock tank oil | | | | Details |
| ORB | OPEC Reference Basket | | | | Details |
| EOU | Ellipsoid Of Uncertainty | | | | Details |
| OSF | Oriented separation factor | | | | Details |
| BO | Black Oil | | | | Details |
| SOL | Süd Ost Leitung | | | | Details |
| yoy | year over year | | | | Details |
| powwow | See comment! | | | | Details |
| pow-wow | See comment! | | | | Details |
| pow wow | See comment! | | | | Details |
| UOM | Upstream Operating Model | | | | Details |
| TSO | Transmission System Operator | | | | Details |
| TOM | Target Operating Model | | | | Details |
| FFO | Funds From Operations | | | | Details |
| FFO | Future Field Operations | | | | Details |
| OPR | Oil Production Rate | | | | Details |
| OIP | Oil In Place | | | | Details |
| SOI | Southern Oscillation Index | | | | Details |
| OB | Ohne Befund | No findings | | | Details |
| LOWIS | Life Of Well Information Software | | | | Details |
| YOY | Year On Year | | | | Details |
| SCO | Shanghai Cooperation Organization | | | | Details |
| DOJ | Department of Justice | | | | Details |
| OSP | official selling price | | | | Details |
| OSPs | official selling prices | | | | Details |
| GOV | Gas Öl Verhältnis GOR | Gas Oil Ratio | | | Details |
| GOV | Gross Observed Volume | | | | Details |
| LOT | Load On Top | | | | Details |
| OBQ | On Board Quantity | | | | Details |
| TOV | Total Observed Volume | | | | Details |
| Khor | Horizontal permeability | | | | Details |
| Pro | Production | | | | Details |
| IOU | I Owe You | | | | Details |
| IOU | investor-owned utilities | | | | Details |
| NAO | North Atlantic Oscillation | | | | Details |
| ENSO | Paleo-El Niño-Southern Oscillation | | | | Details |
| OPC | Operations Controller | | | | Details |
| AOA | Angolan Kwanza | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| BOB | Boliviano | | | | Details |
| NOK | Norwegian Krone | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| COP | Colombian Peso | | | | Details |
| DOP | Dominican Peso | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| JOD | Jordanian Dinar | | | | Details |
| MOP | Macau Pataca | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| MRO | Mauritanian Ouguiya | | | | Details |
| NIO | Nicaraguan Cordoba Oro | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| NOK | Norwegian Krone | | | | Details |
| OMR | Omani Rial | | | | Details |
| RON | Romanian New Leu | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| SOS | Somali Shilling | | | | Details |
| NOK | Norwegian Krone | | | | Details |
| XOF | CFA Franc BCEAO | | | | Details |
| TOP | Tongan Pa'anga | | | | Details |
| UNOV | United Nations Office at Vienna | | | | Details |
| QOS | Quality Of Service | | | | Details |
| OFID | OPEC Fund for International Development | | | | Details |
| MOMR | Monthly Oil Market Report | | | | Details |
| MOPRO | Monthly Production | | | | Details |
| TAPRO | Target Production | | | | Details |
| RHOB | bulk density | | | | Details |
| RHOBdry | bulk density of dry clay | | | | Details |
| RHOMU | clay corrected matrix density | | | | Details |
| ROMA_CPX | apparent matrix density | | | | Details |
| RHOBCL | bulk density of clay | | | | Details |
| RHOMA | matrix density | | | | Details |
| RHOF | fluid density | | | | Details |
| ROMU_CPX | clay/gas corrected matrix density | | | | Details |
| OTH | OberTorton Horizont | upper Torton horizon | | | Details |
| FOC | Free Of Charge | | | | Details |
| ÖWK | Öl Wasser Kontakt | Oil water contact | | | Details |
| ÖWV | Öl Wasser Verhältnis | Oil water ratio | | | Details |
| IOTC | Iran Oil Terminals Company | | | | Details |
| NIOPDC | National Iranian Oil Products Distribution Company | | | | Details |
| OILP | Oil Producer | | | | Details |
| ano | Map Annotation | | | | Details |
| loc | Location | | | | Details |
| log | Trace data | | | | Details |
| ofm | OFM Workspace | | | | Details |
| TON/D | tonne per day | | | | Details |
| To/D | tonne per day | | | | Details |
| To/D | tonne oil per day | | | | Details |
| OFWS | Opportunity Framing WorkShop | | | | Details |
| KJO | Knuckle Joint | | | | Details |
| SJO | Swivel Joint | | | | Details |
| FOE | Fred Olsen Energy | | | | Details |
| NOS | North Sea | | | | Details |
| CFO | Chief Financial Officer | | | | Details |
| CEO | Chief Executive Officer | | | | Details |
| COO | Chief Operating Officer | | | | Details |
| CAO | Chief Accounting Officer | | | | Details |
| CAO | Chief Administrative Officer | | | | Details |
| CAO | Chief Analytics Officer | | | | Details |
| CTO | Chief Transformation Officer | | | | Details |
| KOH | Kalilauge | Caustic potash, Caustic Soda | | | Details |
| SOB | Sondenbehandlung und Bohren | Well handling & drilling department | | | Details |
| IO | Integrated Operations | | | | Details |
| COM | Chance Of Maturation | | | | Details |
| COF | Cost of Failure | | | | Details |
| NOW | now | | | | Details |
| recov | Recoverable | | | | Details |
| Co | Compressibility of Oil | | | | Details |
| TO | to | | | | Details |
| FCO | Foreign Company | | | | Details |
| COD | coefficient of determination | | | | Details |
| COM | Communications | | | | Details |
| TO | Technology & Operations | | | | Details |
| OMS | Operation Management System | | | | Details |
| P/O | Production Operations | | | | Details |
| DPO | Development & Production Operations | | | | Details |
| Comp | Compartment | | | | Details |
| Förderzins | Production tax | | | | Details |
| OG | Open hole Gravel pack | | | | Details |
| ORI | Oil Rate Increase | | | | Details |
| ORD | Oil Rate Decrease | | | | Details |
| OGR | Oil Gas Ratio | | | | Details |
| ÖGV | Öl Gas Verhältnis | OGR - Oil Gas Ratio | | | Details |
| OEGV | Öl Gas Verhältnis | OGR - Oil Gas Ratio | | | Details |
| OEB | Oil Equivalent Barrel | | | | Details |
| U&O | Up & Operational | | | | Details |
| vorb. | Vorbereitung | Get it ready | | | Details |
| MOVE | Moved to other reservoir | | | | Details |
| PROJ | Project for evaluation | | | | Details |
| Tongehalt | Clay content | | | | Details |
| Rat hole | In the context of a drilling rig, a rat hole is the hole through the rig floor where the kelly can be stored when it has to be disconnected | | | | Details |
| Rat hole | In the context of a well, a rat hole is the hole below the pay zone. Commonly drilled to drop off perforating guns of a gathering or sump area for liquids to separate from gas prior to being pumped. | | | | Details |
| Sackloch | Rat hole | | | | Details |
| PO | Planning Object | | | | Details |
| OCUT | Oil Cut | | | | Details |
| BOCL | a kind of a weight set packer | | | | Details |
| A-Öl | Asphaltierte Öl | Asphaltinic Oil | | | Details |
| A-Oil | Asphaltic Oil | | | | Details |
| A Öl | Asphaltierte Öl | Asphaltinic Oil | | | Details |
| A Oil | Asphaltic Oil | | | | Details |
| P-Öl | Paraffin Öl | Paraphinic Oil | | | Details |
| P-Oil | Paraphinic Oil | | | | Details |
| P Öl | Paraffin Öl | Paraphinic Oil | | | Details |
| P Oil | Paraphinic Oil | | | | Details |
| IDOF | Intelligent Digital Oil Field | | | | Details |
| ROIP | Remaining oil in place | | | | Details |
| 2LoT | 2nd Law of Thermodynamics | 2nd Law of Thermodynamics | 2. Hauptsatz der Thermodynamik | 2ème loi de la thermodynamique | Details |
| AAIOR | annualized average incremental oil rate | annualized average incremental oil rate | annualisierten durchschnittlichen zusätzlichen Ölrate | taux moyen annualisé de pétrole supplémentaire | Details |
| AAMO | Apparent Anisotropic Move Out (WesternGeco) | Apparent Anisotropic Move Out (WesternGeco) | Scheinbare anisotroper Move Out (WesternGeco) | Anisotropic apparente Move Out (WesternGeco) | Details |
| AAODC | American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC) | American Association of Oilwell Drilling Contractors (obsolete; superseded by IADC) | American Association of Oilwell Drilling Contractors (veraltet; ersetzt durch IADC) | American Association of Oilwell Drilling Contractors (obsolète, remplacé par IADC) | Details |
| AAODC | American Association of Oilwell Drilling Contractors | American Association of Oilwell Drilling Contractors | American Association of Oilwell Drilling Contractors | American Association of Oilwell Drilling Contractors | Details |
| AAODC | See IADC | See IADC | Siehe IADC | Voir IADC | Details |
| abd loc | abandoned location | abandoned location | verlassenen Standort | emplacement abandonné | Details |
| abd-ogw | abandoned oil & gas well | abandoned oil & gas well | aufgegeben Öl & Gas gut | pétrole et gaz puits abandonné | Details |
| abd-ow | abandoned oil well | abandoned oil well | verlassenen Ölquelle | abandonné puits de pétrole | Details |
| ABO | Aker Borgestad Operations | Aker Borgestad Operations | Aker Borgestad Operationen | Aker Borgestad Operations | Details |
| ABOI | Assn. of British Oceanic Industries UK | Assn. of British Oceanic Industries UK | Assn. British Oceanic Industries UK | Assoc. de la Colombie-Oceanic Industries UK | Details |
| OÖFG | OberÖsterreich Fern Gas | A company in Austria active in energy sector | | | Details |
| OÖF | OberÖsterreich Fern Gas | A company in Austria active in energy sector | | | Details |
| OOEF | OberÖsterreich Fern Gas | A company in Austria active in energy sector | | | Details |
| Vorj | Vorherige Jahr | previous year | | | Details |
| WOMP | Well Operation Management Plan | | | | Details |
| GOK | Gas Öl Kontakt | Gas Oil Contact | | | Details |
| WOK | Wasser Öl Kontakt | Water Oil Contact | | | Details |
| OGK | Öl Gas Kontakt | Oil Gas Contact | | | Details |
| OGC | Oil Gas Contact | | | | Details |
| GOEK | Gas Öl Kontakt | Gas Oil Contact | | | Details |
| WOEK | Wasser Öl Kontakt | Water Oil Contact | | | Details |
| OEGK | Öl Gas Kontakt | Oil Gas Contact | | | Details |
| OEWK | Öl Wasser Kontakt | Oil Water Contact | | | Details |
| GÖK | Gas Öl Kontakt | Gas Oil Contact | | | Details |
| WÖK | Wasser Öl Kontakt | Water Oil Contact | | | Details |
| ÖGK | Öl Gas Kontakt | Oil Gas Contact | | | Details |
| ÖGV | Öl Gas Verhältnis | Oil Gas Ratio | | | Details |
| WÖV | Wasser Öl Verhältnis | Water Oil Ratio | | | Details |
| OEGV | Öl Gas Verhältnis | Oil Gas Ratio | | | Details |
| WOEV | Wasser Öl Verhältnis | Water Oil Ratio | | | Details |
| OGV | Öl Gas Verhältnis | Oil Gas Ratio | | | Details |
| WOV | Wasser Öl Verhältnis | Water Oil Ratio | | | Details |
| x-LOT | Extended Leak Off Test | | | | Details |
| xLOTS | Extended Leak Off Tests | | | | Details |
| STO | Short Term Optimization | | | | Details |
| CPO | Chief Procurement Officer | | | | Details |
| OFS | Outboard Front Seal | | | | Details |
| EOV | Entnahme ohne Verdichtung | Gas production without the help of a compressor into the main pipeline | | | Details |
| SOV | Einspeichern ohne Verdichtung | Storing gas without the help of a compressor into the reservoir | | | Details |
| OIR | Oil Injection Rate | | | | Details |
| WOPR | Well Oil Production Rate | | | | Details |
| FOPR | Field Oil Production Rate | | | | Details |
| WOPT | Well Oil Production Total | | | | Details |
| FOPT | Field Oil Production Total | | | | Details |
| WWOR | Well Water Oil Ratio | | | | Details |
| WGOR | Well Gas Oil Ratio | | | | Details |
| FWOR | Field Water Oil Ratio | | | | Details |
| FGOR | Field Gas Oil Ratio | | | | Details |
| FOPR | Field Oil Production Rate | | | | Details |
| BOFT | Block Oil Flow Total | | | | Details |
| COFR | Connection Oil Flow Rate | | | | Details |
| ROIP | Region Oil In Place | | | | Details |
| BOSAT | Block Oil SATuration | | | | Details |
| DOF | Depth Of Field | | | | Details |
| TO | Tonne | 1000 kg | | | Details |
| SCOPE | Step Change in Operations and Production Efficiency | | | | Details |
| OEOC | Oil Exploration Operations Company | | | | Details |
| MOW | Momentanwerte | moment value, at the moment value | | | Details |
| PONT | PONT (Geological formation in Austria) | | | | Details |
| OSH | Obere Sarmat (Geological formation in Austria) | | | | Details |
| Kanone Abwerfen | Gun release | | | | Details |
| KOGR | Korn Grosse | Grain size distribution | | | Details |
| Molch | pig | scraper, go-devil | | | Details |
| Molchschleuse | Scraper trap | | | | Details |
| RTPO | Real-Time Production Optimization | | | | Details |
| WFO | WasserFlut Ost | Fresh Water east | | | Details |
| RROR | Real Terms Rate of Return | | | | Details |
| IOWC | Initial Oil Water Contact | | | | Details |
| IWOC | Initial Water Oil Contact | | | | Details |
| D2O | Deuterium oxide, heavy water | | | | Details |
| DOP | Detailed Operation Procedure | | | | Details |
| ELOT | Extended Leak Off Test | Same as XLOT | | | Details |
| IODP | Integrated Ocean Drilling Program | | | | Details |
| ODP | Ocean Drilling Program | | | | Details |
| LOP | Leak Off Pressure | | | | Details |
| LOP | Leak Of Point | | | | Details |
| DOV | Delayed Opening Valve | | | | Details |
| Steigrohr | Tubing | Tubing | | | Details |
| OEMs | original equipment manufacturers | | | | Details |
| O.W.C. | Oil Water Contact | | | | Details |
| PortMan | Portfolio Management | | | | Details |
| EOL | End Of Lifetime | | | | Details |
| OE. | Ohne Ergebnis | Without Success | | | Details |
| DOM | Days Of Month | | | | Details |
| SEO | Search Engine Optimization | | | | Details |
| SMO | Social Media Optimization | | | | Details |
| Schlucksonde | Schluckbohrung | Disposal well, | | | Details |
| MOT | Mobile Oil Treater | | | | Details |
| KOD | Kockout drum | | | | Details |
| SIMOP | Simultaneous Operation | | | | Details |
| HOD | head Of Department | | | | Details |
| IFOT | Injection Fall Off Test | | | | Details |
| PO | Production and Operation | | | | Details |
| LGO | Light Gas Oil | | | | Details |
| HGO | Heavy Gas Oil | | | | Details |
| MGO | Marine gas oil | | | | Details |
| MDO | Marine diesel oil | | | | Details |
| IFO | Intermediate fuel oil | | | | Details |
| MFO | Marine fuel oil | | | | Details |
| HFO | Heavy fuel oil | | | | Details |
| IOGP | International Association of Oil and Gas Producers | | | | Details |
| octg | oil country tubular goods | | | | Details |
| MOC | Motor Current | | | | Details |
| MO | modus operandi | | | | Details |
| M.O. | modus operandi | | | | Details |
| OPRES | OMV Petroleum Resources Evaluation Standard | | | | Details |
| OMPDP | Opportunity Maturation and Project Delivery Process | | | | Details |
| COP | Cease Of Production | | | | Details |
| ROT | Redundant, Obsolete, Trivial | | | | Details |
| EOD | End of Day | | | | Details |
| EOB | End Of Business (day) | | | | Details |
| COB | Close of Business | | | | Details |
| EOP | End Of Play | | | | Details |
| COP | Close Of Play | | | | Details |
| TRO | Test Rack Opening (pressure) | | | | Details |
| ao | among others | | | | Details |
| a.o. | among others | | | | Details |
| ao. | among others | | | | Details |
| CPOR | Core porosity | | | | Details |
| AOK | Angolan kwanza | | | | Details |
| ASECOND | second (angle) | | | | Details |
| BOB | Bolivian boliviano | | | | Details |
| Btu/h.oF.ft2 | GeoFrame legacy unit | | | | Details |
| COP | Colombian peso | | | | Details |
| DOP | Dominican peso | | | | Details |
| FOOT | foot (international) | | | | Details |
| ftGoldCoast | Foot (Gold Coast) | | | | Details |
| GALLON | gallon (U.S.) | | | | Details |
| Gohm | gigaohm | | | | Details |
| HOURS | hour | | | | Details |
| J/s.oC.m2 | GeoFrame legacy unit | | | | Details |
| kcal/h.oC.m2 | GeoFrame legacy unit | | | | Details |
| KILOGRAM | kilogram | | | | Details |
| KILOGRAMS | kilogram | | | | Details |
| KILOMETER | kilometer | | | | Details |
| KILOMETERS | kilometer | | | | Details |
| KILOMETRE | kilometer | | | | Details |
| KILOMETRES | kilometer | | | | Details |
| kmol | kilomole | | | | Details |
| KMOL/M3 | kilomole per cubic meter | | | | Details |
| kmol/m3 | kilomole per cubic meter | | | | Details |
| knot | nautical mile per hour | | | | Details |
| KOHM | kilohm | | | | Details |
| kohm | kilohm | | | | Details |
| LTON | U.K. long ton | | | | Details |
| MEGO | megohm | | | | Details |
| mho/m | GeoFrame legacy unit | | | | Details |
| MICROSECOND | microsecond | | | | Details |
| MICROSECONDS | microsecond | | | | Details |
| MILLISECOND | millisecond | | | | Details |
| MILLISECONDS | millisecond | | | | Details |
| mmho | millimho per meter | | | | Details |
| mmho/m | millimho per meter | | | | Details |
| mmol | millimole | | | | Details |
| mmol/L | millimole per liter | | | | Details |
| Mohm | megohm | | | | Details |
| MOHM | milliohm | | | | Details |
| mohm | milliohm | | | | Details |
| mol/L | mole per liter | | | | Details |
| mol/m3 | mole per cubic meter | | | | Details |
| mole % | GeoFrame legacy unit | | | | Details |
| MOLL | mole per liter | | | | Details |
| MOLM | mole per cubic meter | | | | Details |
| MOP | Macauan pataca | | | | Details |
| MORS | microhm root second | | | | Details |
| MRO | Mauritanian ouguiya | | | | Details |
| MTON | metric ton (1000 kilograms) | | | | Details |
| nohm | nanohm | | | | Details |
| O/M | ohm per meter | | | | Details |
| oAPI | GeoFrame legacy unit | | | | Details |
| oC | GeoFrame legacy unit | | | | Details |
| oC/h | GeoFrame legacy unit | | | | Details |
| oC/hm | GeoFrame legacy unit | | | | Details |
| oC/km | GeoFrame legacy unit | | | | Details |
| oC/m | GeoFrame legacy unit | | | | Details |
| Oe | oersted | | | | Details |
| OER | oersted | | | | Details |
| oersted | GeoFrame legacy unit | | | | Details |
| oF | GeoFrame legacy unit | | | | Details |
| oF/100ft | GeoFrame legacy unit | | | | Details |
| oF/ft | GeoFrame legacy unit | | | | Details |
| oF/m | GeoFrame legacy unit | | | | Details |
| OHM.M | ohm-meter | | | | Details |
| ohm.m | ohm-meter | | | | Details |
| ohm/m | ohm per meter | | | | Details |
| ohmm | ohm-meter | | | | Details |
| OHMM | ohm-meter | | | | Details |
| OHMS | ohm | | | | Details |
| oK | GeoFrame legacy unit | | | | Details |
| OMR | Omani rail | | | | Details |
| ozf | ounce force | | | | Details |
| ozm | ounce mass | | | | Details |
| POUND | pound mass (avoirdupois) | | | | Details |
| POUNDS | pound mass (avoirdupois) | | | | Details |
| ROL | Romainian leu | | | | Details |
| SECOND | second | | | | Details |
| SECONDS | second | | | | Details |
| SOS | Somali shilling | | | | Details |
| STON | U.S. short ton | | | | Details |
| Tohm | teraohm | | | | Details |
| ton | U.S. short ton | | | | Details |
| tonUK | long ton (U.K.) | | | | Details |
| tonUS | short ton (U.S.) | | | | Details |
| TOP | Tongan paUanga | | | | Details |
| UMHO | micromho | | | | Details |
| umol | micromole | | | | Details |
| UO/F | microhm per foot | | | | Details |
| UO/M | microhm per meter | | | | Details |
| UOHM | microhm | | | | Details |
| uohm | microhm | | | | Details |
| uohm/ft | microhm per foot | | | | Details |
| uohm/m | microhm per meter | | | | Details |
| volts | volt | | | | Details |
| Volts | volt | | | | Details |
| XOF | CFA franc, West Africa | | | | Details |
| CNPOR | CN selected Porosity | | | | Details |
| CNPORU | CN Limestone Porosity uncorrected | | | | Details |
| CPOR | Core Porosity | | | | Details |
| DRHO | Bulk Density Correction | | | | Details |
| HTHO | HNGS Formation Thorium Concentration | | | | Details |
| HMNO | Resistivity high res. MNOR | | | | Details |
| MNOR | Resistivity Micro Normal 2in | | | | Details |
| NPOR | Enhanced TNPH | | | | Details |
| PSW_OH | Bulk Volume Water in unflushed Zone (open Hole) | | | | Details |
| PSXO | Bulk Volume of flushed Zone Water | | | | Details |
| PSXO_OH | Bulk Volume of flushed Zone Water (open Hole) | | | | Details |
| RHO | Density from Standardlog | | | | Details |
| RHOB | Bulk density | | | | Details |
| RHOZ | Bulk density | | | | Details |
| ROBB | Bulk Density, Bottom Quadrant | | | | Details |
| ROP | Rate of Penetration | | | | Details |
| RXO | Resistivity Rxo from Microlog | | | | Details |
| RXO8 | Resistivity 8in-Rxo | | | | Details |
| RXOZ | Resistivity 2in sampled computed Rxo | | | | Details |
| SMNO | Synthetic Micro-Normal Resistivity | | | | Details |
| SXO | PV Water Saturation in Invaded Zone | | | | Details |
| ZCOR | Density correction | | | | Details |
| POTA | Potassium Concentration | | | | Details |
| THOR | Thorium Concentration | | | | Details |
| DRHO | Bulk Density Correction | | | | Details |
| DTCO | Delta T Sonic, Compressional | | | | Details |
| HMNO | HIP Micro Normal Resistivity | | | | Details |
| NPOR | Neutron Porosity | | | | Details |
| POTA | Potassium (Petro Standardlog) | | | | Details |
| RHO | Density from Standardlog (Petro Standardlog) | | | | Details |
| RHOB | Bulk Density | | | | Details |
| RHOZ | HRDD Standard Resolution Formation Density | | | | Details |
| ROBB | Bulk Density, Bottom Quadrant | | | | Details |
| RXO | Resistivity Rxo from Microlog | | | | Details |
| RXOZ | Invaded Formation Resistivity filtered at 18 inches | | | | Details |
| THOR | Thorium (Petro Standardlog) | | | | Details |
| BVWSXO | Bulk Volume Water flushed Zone | | | | Details |
| CPOR | Core Porosity | | | | Details |
| PHIE_orig | | | | | Details |
| PSW_OH | Bulk Volume Water in unflushed Zone (open Hole) | | | | Details |
| PSXO | Bulk Volume of flushed Zone Water | | | | Details |
| PSXO_OH | Bulk Volume of flushed Zone Water (open Hole) | | | | Details |
| RXO | Resistivity from Microlog | | | | Details |
| SXO | PV Water Saturation in Invaded Zone | | | | Details |
| VCOAL | Volume of Coal | | | | Details |
| VDOL | Volume of Dolomite relative to total Volume | | | | Details |
| VDOL_CPX | Volume of Dolomite | | | | Details |
| VUOI | Volume of Oil in Undisturbed Zone | | | | Details |
| VXOI | Volume of Oil in Flushed Zone | | | | Details |
| BOO | Build Own Operate | | | | Details |
| COP | Community of Practice | | | | Details |
| EOP | Exploration, Operations and Projects | | | | Details |
| EPIC Contract | Engineer, Procure, Install and Commission | | | | Details |
| Excom | Exploration Committee | | | | Details |
| FPSO | Floating Production, Storage and Offloading Vessel | | | | Details |
| HO | Head Office | | | | Details |
| JOP | Joint Operation Procedure | | | | Details |
| JVOA | Joint Venture Operating Agreement | | | | Details |
| MTO | Material Take-Off (Sheet) | | | | Details |
| O&M | Operating and Maintenance | | | | Details |
| OBS | Organisational Breakdown Structure | | | | Details |
| OCM | Operational Comitee Meeting | | | | Details |
| Opex | Operational Expenditure | | | | Details |
| OSB | Oil Storage Barge | | | | Details |
| OSD | Oil Shore Development | | | | Details |
| OTD | Order to Delivery | | | | Details |
| PCO | Project Change Order | | | | Details |
| PMO | Project Management and Operations Department | | | | Details |
| ROM | Reliability, Operability, Maintainability (Engineering) | | | | Details |
| ROS | Required on Site (Date) | | | | Details |
| SoR | Schedule of Rates | | | | Details |
| TCoO | Total cost of Ownership | | | | Details |
| TO | Technology and Operations Department | | | | Details |
| TUCO | Turbined Compressor | | | | Details |
| bioturb | bioturbated | | | | Details |
| Chlor | chloritic | | | | Details |
| Choc | chocolate | | | | Details |
| Cohesv | cohesive | | | | Details |
| Col | color | | | | Details |
| Condns | condensate | | | | Details |
| Cons | consolidated | | | | Details |
| Conv | convolute | | | | Details |
| dolc | dolomitic | | | | Details |
| fluor | fluorescence | | | | Details |
| fos | fossiliferous | | | | Details |
| interafom | informational | | | | Details |
| Kao | kaolinitic | | | | Details |
| kaol | kaolinite | | | | Details |
| mod | moderately | | | | Details |
| mot | mottled | | | | Details |
| occ | occasionally | | | | Details |
| occl | occasional | | | | Details |
| oss | ossicles | | | | Details |
| ovgth | overgrowth | | | | Details |
| ovtrn | overturned | | | | Details |
| poly | poly | | | | Details |
| polyxl | polycrystalline | | | | Details |
| slo | slow | | | | Details |
| stylo | stylolitic | | | | Details |
| zoo | zoophycus | | | | Details |
| BOEPD | Barrels of Oil Equivalent Per Day | | | | Details |
| BOP | Blow Out Preventor | | | | Details |
| CISO | Chief Information Security Officer | | | | Details |
| COB | Close of business | | | | Details |
| CoM | Chance of Maturation | | | | Details |
| CoP | Community of Practice | | | | Details |
| CTO | Chief Technology Officer | | | | Details |
| EMOC | Electronic Management of Change | | | | Details |
| EOB | End Of Business (day) | | | | Details |
| EOBD | End Of Business Day | | | | Details |
| EOD | End of (the) Day | | | | Details |
| ESCo | Energy Service Company | | | | Details |
| ETSO | European Transmission and System Operators | | | | Details |
| FCO | field change order | | | | Details |
| FIFO | First In, First Out | | | | Details |
| FOA | Farmout Agreement | | | | Details |
| FOS | Fleet Online Services | | | | Details |
| HAZOP | Operational Hazards | | | | Details |
| HIPO | High Potential (Accident) | | | | Details |
| HO | Head Office | | | | Details |
| HOSYI | Head Office Stakeholder Synchronization Initiative | | | | Details |
| HVO | Hydrotreated Vegetable Oil | | | | Details |
| IASDEO | Identify, Assess, Select, define, Execute, Operate | | | | Details |
| IOR | Increased Oil Recovery | | | | Details |
| ITOT | IT Operational Task | | | | Details |
| LOF | Life of Field | | | | Details |
| MbO | Management by Objectives | | | | Details |
| MO | Metering Operator | | | | Details |
| MOC | Microsoft Office Communicator | | | | Details |
| MOOM | Merchant Outlet Operations Manual | | | | Details |
| NFO | Near Field Opportunities | | | | Details |
| NOB | Non Oil Business | | | | Details |
| NOV | non-operated venture | | | | Details |
| OBAM | Office-based account manager (TeleSales) | | | | Details |
| OBS | Organizational Breakdown Structure | | | | Details |
| OBSA | Open Book Service Agreement | | | | Details |
| OFM | Oil Field Manager | | | | Details |
| OGRC | Oil & Gas Reserves Committee | | | | Details |
| OGS | OMV Global Solutions GmbH | | | | Details |
| OIL | Opportunity Identification List | | | | Details |
| OIS | OMV International Services GmbH | | | | Details |
| OM&L | Operation, Maintenance & Logistic | | | | Details |
| OMPD | Opportunity Maturation & Project Delivery | | | | Details |
| OoO | Out of Office | | | | Details |
| OPEX | Operational Expenditures | | | | Details |
| OPS | OMV Personal Services | | | | Details |
| OR | Opportunity Register (from MAR workshop) | | | | Details |
| OR&A | Operations Readiness & Assurance | | | | Details |
| O's & T's | Opportunities and Threats | | | | Details |
| OV | Operated Venture | | | | Details |
| OVIP | Original Volume in Place | | | | Details |
| PDO | Plan for Development and Operation | | | | Details |
| Photogrammetry | 'photo' = light; 'gram' = drawing; 'metry' = measurement | | | | Details |
| PIO | Plan for Installation and Operation | | | | Details |
| PLO | Project List Overview | | | | Details |
| PMBOK | Project Management Book Of Knowledge | | | | Details |
| PMO | Project Management Office | | | | Details |
| PO | Petrol Ofisi | | | | Details |
| PO | Project Owner | | | | Details |
| POA | Profit on ordinary activities | | | | Details |
| POAS | Petrol Ofisi A.Ş. | | | | Details |
| PoC | Proof of Concept | | | | Details |
| POS | Point of Sales | | | | Details |
| ProCo | Project Coordinator | | | | Details |
| PSO | Production System Optimisation | | | | Details |
| ROA | Real Options Analysis | | | | Details |
| ROE | Return on equity | | | | Details |
| ROFA | Return on fixed assets | | | | Details |
| RONA | Return on net assets | | | | Details |
| ROV | Real Options Valuation | | | | Details |
| RoW | Rest of World | | | | Details |
| SCOB | Standard Customer Offer Book | | | | Details |
| SONVIS | SonicVISION | | | | Details |
| SORP | Statements of Recommended Practice | | | | Details |
| STO | Short-term optimization | | | | Details |
| StVo | Straßenverkehrsordnung | | | | Details |
| SWOT | Strenghts, Weaknesses, Opportunities and Threats | | | | Details |
| TECOP | Technical, Economical, Commercial, Organizational, Political-Societal | | | | Details |
| TelCo | Telephone Conference | | | | Details |
| TOC | Tasbulat Oil Company | | | | Details |
| VGO | Vacuum Gas Oil | | | | Details |
| VOLTS | Volume Tracking System | | | | Details |
| VOSI | Vorstandssitzung | | | | Details |
| AEOS | All Employees Opinion Survey | | | | Details |
| B/O | Break out | | | | Details |
| BOE | Barrel of Oil Equivalent | | | | Details |
| COB | Close of Business | | | | Details |
| CORAL | Cost Reduction Alliance Malaysia | | | | Details |
| DDOR | Daily Drilling Operations Report | | | | Details |
| DOE | Department of Environment | | | | Details |
| DOSH | Department of Occupational Safety & Health | | | | Details |
| EOS | Earliest On Site | | | | Details |
| EOS | Economies Of Scale | | | | Details |
| FPSO | Floating Production Storage & Offloading | | | | Details |
| GO | Global Optimisation | | | | Details |
| HAZOP | Hazard and Operability Study | | | | Details |
| KOIV | Knock Out Isolation valve Made of ceramic and therefore, you can knock it out to activate. Opposite of a BPV | | | | Details |
| L/O | Lay out | | | | Details |
| Lo/Hi-vis | Low and High Viscous mud used in conjunction with sea water in order to lift cuttings up to surface | | | | Details |
| LOA | Letter of Authorisation | | | | Details |
| LOI | Letter of Intent | | | | Details |
| LOS | Latest on Site | | | | Details |
| LOT | Leak off test. To determine formation strength. | | | | Details |
| MOA | Manual of Authorities | | | | Details |
| NOP | Notice of Operations | | | | Details |
| O/pull | Overpull | | | | Details |
| OBM | oil-based drilling fluid (mud) | | | | Details |
| OCM | Operations Committee Meeting | | | | Details |
| OIM | Offshore/Onshore Installation Manager | | | | Details |
| OIW | Oil-in-Water | | | | Details |
| OMW | Original Mud Weight | | | | Details |
| OR | Organisational Review | | | | Details |
| OREDA | Offshore Reliability Data | | | | Details |
| OSHA | Occupational Safety and Health Act | | | | Details |
| OT | Overtime | | | | Details |
| OU | Operating Unit | | | | Details |
| OUBP | Operating Unit Business Plan | | | | Details |
| POB | Personnel on Board | | | | Details |
| POIF | Potential Occupational Incident Frequency | | | | Details |
| RSBOP | Rotating Spherical blow out preventor | | | | Details |
| SBOP | Surface Blow Out Preventor | | | | Details |
| SBOP | Shore Based Operations | | | | Details |
| SOV | Side outlet valves | | | | Details |
| TCoO | Total Cost of Ownership | | | | Details |
| TECOP | Technical Economical Commercial Organisational Political | | | | Details |
| TOC | Total Organic Content | | | | Details |
| TOSA | Technical Operating Services Agreement | | | | Details |
| TROIF | Total Recordable Occupational Illness Frequency | | | | Details |
| UBHO | Universal Bottom Hole Assembly | | | | Details |
| UOC | Unit Operating Cost | | | | Details |
| WOCS | Work Over Completion System | | | | Details |
| X/O | Cross over Used to join two different casings etc | | | | Details |
| CAO | Chief Accounting Officer | | | | Details |
| CBOE | Chicago Board Options Exchange | | | | Details |
| CBOT | Chicago Board of Trade | | | | Details |
| CDO | Collateralized debt obligation | | | | Details |
| COA | Chart of Account | | | | Details |
| CF OPEX | Operational Expenditures | | | | Details |
| CIO | Chief Information Officer or Chief Investment Officer | | | | Details |
| CMO | Chief Marketing Officer | | | | Details |
| COB | Close of Business | | | | Details |
| COGS | Cost of Goods Sold | | | | Details |
| CSO | Chief Security Officer | | | | Details |
| CTO | Chief Technology Officer | | | | Details |
| DSO | Days Sales Outstanding | | | | Details |
| EFTPOS | Electronic Funds Transfer at Point of Sale | | | | Details |
| EOB | End Of the Business | | | | Details |
| EOD | End Of the Day | | | | Details |
| EOM | End Of Message | | | | Details |
| FOB | Freight On Board | | | | Details |
| FIFO | First In, First Out | | | | Details |
| FOMC | Federal Open Market Committee | | | | Details |
| FPO | Follow on public offer | | | | Details |
| FOC | Free Of Cost | | | | Details |
| GPO | Group purchasing organization | | | | Details |
| GMROII | Gross Margin Return on Inventory Investment | | | | Details |
| KIBOR | Karachi Interbank Offered Rate | | | | Details |
| LBO | Leveraged Buyout | | | | Details |
| LIBOR | London Interbank Offered Rate | | | | Details |
| LIFO | Last In, First Out | | | | Details |
| MoM | Month on Month / Month over Month | | | | Details |
| MOQ | Minimum Order Quantity | | | | Details |
| MSOD | Monthly Statement of Select Operational Data | | | | Details |
| NCBO | No Change of Beneficial Ownership | | | | Details |
| NOA | Net Operating Assets | | | | Details |
| NOI | Net Operating Income | | | | Details |
| OC | Opportunity Cost | | | | Details |
| OCF | Operating cash flow | | | | Details |
| OECD | Organisation for Economic Co operation and Development | | | | Details |
| OIBDA | Operating Income Before Depreciation And Amortization | | | | Details |
| OPEX | Operational Expenditures | | | | Details |
| OTC | Over the counter (finance) | | | | Details |
| PO | Profit Objective or Purchase Order | | | | Details |
| POS | Point of sale | | | | Details |
| QoQ | Quarter on quarter | | | | Details |
| ROE | Return on Equity | | | | Details |
| ROIC | Return on Invested Capital | | | | Details |
| RONA | Return on net assets | | | | Details |
| ROS | Return on Sales | | | | Details |
| S&OP | Sales and operations planning | | | | Details |
| SIOP | Sales Inventory and Operations Plan | | | | Details |
| SOHO | Small Office/Home Office | | | | Details |
| SOX | Sarbanes Oxley | | | | Details |
| SROI | Social return on investment | | | | Details |
| SOW | Statement Of Work | | | | Details |
| TCO | Total Cost of Ownership | | | | Details |
| TOTW | Time Off for Time Worked | | | | Details |
| wo | work order | | | | Details |
| ZOPA | Zone of Possible Agreement | | | | Details |
